Local reactions included pain at the injection site, redness and swelling and were recorded by participants in an electronic diary. Redness and swelling were measured and recorded in measuring device units, where 1 measuring device unit=0.5 centimeter (cm). Redness and swelling were graded as mild (Grade 1): greater than (\>) 2.0 cm to 5.0 cm; moderate (Grade 2): \>5.0 cm to 10.0 cm; severe (Grade 3): \>10 cm; potentially life-threatening (Grade 4): necrosis or exfoliative dermatitis (redness) and necrosis (swelling). Pain at injection site was graded as mild (Grade 1): did not interfere with activity; moderate (Grade 2): interfered with activity; severe (Grade 3): prevented daily activity and potentially life-threatening (Grade 4): emergency room visit or hospitalization for severe pain. Grade 4 reactions were classified by the investigator or medically qualified person. Exact 2-sided confidence interval was based on the Clopper and Pearson method.

Local reactions included pain at the injection site, redness and swelling and were recorded by participants in an electronic diary. Redness and swelling were measured and recorded in measuring device units, where 1 measuring device unit=0.5 cm. Redness and swelling were graded as mild (Grade 1): \>2.0 cm to 5.0 cm; moderate (Grade 2): \>5.0 cm to 10.0 cm; severe (Grade 3): \>10 cm; potentially life-threatening (Grade 4): necrosis or exfoliative dermatitis. Pain at injection site was graded as mild (Grade 1): did not interfere with activity; moderate (Grade 2): interfered with activity; severe (Grade 3): prevented daily activity and potentially life-threatening (Grade 4): emergency room visit or hospitalization for severe pain. Grade 4 reactions were classified by the investigator or medically qualified person. Exact 2-sided confidence interval was based on the Clopper and Pearson method.

Systemic events included fever, vomiting, diarrhea, headache,fatigue,chills,new/worsened muscle pain \& new/worsened joint pain \& recorded by participants in an electronic diary.Fever defined as oral temperature greater than equal to(\>=)38.0 degrees Celsius(deg C) \& categorized as\>=38.0 to 38.4 deg C, \>38.4 to 38.9 deg C,\>38.9 to 40.0 deg C \& \>40.0 deg C. Vomiting graded as:Grade(G)1:1-2 times in 24 hours(h);G2:\>2 times in 24h;G3:required Intravenous (IV) hydration.Diarrhea graded as: G1:2-3 loose stools in 24h;G2: 4-5 loose stools in 24h;G3: 6 or more loose stools in 24h.Headache,fatigue,chills, new/worsened muscle pain \& new/worsened joint pain:G1:didn't interfere with activity;G2: some interference with activity;G3:prevented daily routine activity.For all systemic events except fever, Grade 4=emergency room visit or hospitalization. Grade 4 events were classified by the investigator or medically qualified person.Exact 2-sided confidence interval based on Clopper and Pearson method.

Systemic events included fever, vomiting, diarrhea, headache, fatigue, chills, new/worsened muscle pain \& new /worsened joint pain \& recorded by participants in electronic diary. Fever defined as oral temperature \>=38.0 deg C \& categorized as \>=38.0 to 38.4 deg C, \>38.4 to 38.9 deg C, \>38.9 to 40.0 deg C \& \>40.0 deg C. Vomiting graded as: Grade(G) 1: 1-2 times in 24 h; G2: \>2 times in 24 h; G3: required IV hydration. Diarrhea graded as: G1: 2-3 loose stools in 24 h; G2: 4-5 loose stools in 24 h; G3: 6 or more loose stools in 24 h. Headache, fatigue, chills, new/worsened muscle pain \& new/worsened joint pain: G1: didn't interfere with activity; G2: some interference with activity; G3: prevented daily routine activity. For all systemic events except fever, Grade 4= emergency room visit or hospitalization. Grade 4 events were classified by the investigator or medically qualified person. Exact 2-sided confidence interval based on Clopper and Pearson method.

An adverse event (AE) was defined as any untoward medical occurrence in a participant temporally associated with the use of study intervention, whether or not considered related to the study intervention. Exact 2-sided 95% CI was based on the Clopper and Pearson method. Only AEs collected by non-systematic assessment (i.e, excluding local reactions and systematic events) were reported in this outcome measure.

An AE was defined as any untoward medical occurrence in a participant temporally associated with the use of study intervention, whether or not considered related to the study intervention. Exact 2-sided 95% CI was based on the Clopper and Pearson method. Only AEs collected by non-systematic assessment (i.e. excluding local reactions and systemic events) were reported in this outcome measure.

An SAE was defined as any untoward medical occurrence that, at any dose, met one or more of the following criteria - resulted in death, was life-threatening, required inpatient hospitalization or prolongation of existing hospitalization, resulted in persistent or significant disability/incapacity, was a congenital anomaly/birth defect and was a suspected transmission via a Pfizer product of an infectious agent, pathogenic or non-pathogenic and other important medical event.

Hematology parameters included erythrocytes, lymphocytes, neutrophils, eosinophils/leukocytes, erythrocyte (ery) mean corpuscular volume, ery. mean corpuscular hemoglobin and ery. mean corpuscular hemoglobin concentration. The primary criteria were as follows erythrocytes, lymphocytes, neutrophils: \<0.8\*lower limit of normal (LLN); Lymphocytes/Leukocytes, Eosinophils/Leukocytes, Monocytes/Leukocytes: \>1.2\*upper limit of normal (ULN); Ery. Mean Corpuscular Volume:\>1.1\*ULN; Ery. Mean Corpuscular Hemoglobin and Ery.Mean Corpuscular hemoglobin Concentration: \< 0.9\*LLN. Also add 95% CI was based on Clopper and Pearson method.

Hematology parameters included erythrocytes, neutrophils, eosinophils/leukocytes, monocytes/leukocytes, ery mean corpuscular hemoglobin. The primary criteria were as follows erythrocytes and neutrophils: \<0.8\* LLN; Eosinophils/Leukocytes and Monocytes/Leukocytes: \>1.2\* ULN; Ery. Mean Corpuscular Hemoglobin:\>1.1\*ULN. 95% CI was based on Clopper and Pearson method.

Chemistry parameters included blood urea nitrogen and C-reactive protein. The primary criteria were as follows Blood Urea Nitrogen: \> 1.3\*ULN; C Reactive Protein: \> 1.1\*ULN. 95% CI was based on Clopper and Pearson method.

Chemistry parameters included blood urea nitrogen and C-reactive protein. The primary criteria were as follows Blood Urea Nitrogen: \> 1.3\*ULN; C Reactive Protein: \> 1.1\*ULN. Also add 95% CI was based on Clopper and Pearson method.

Hematology parameters included hemoglobin, lymphocytes, neutrophils decrease, platelets decrease, white blood cells (WBC) decrease and WBC increase. Laboratory abnormalities were graded by Food and Drug Administration (FDA) toxicity grading scale for healthy adult volunteers enrolled in preventive vaccine clinical trials as grade 1=mild; grade 2=moderate; grade 3=severe and grade 4=potentially life-threatening. Percentage of participants with shift in hematology values were reported in this outcome measure. Categories with at least 1 non-zero data values showing any shift in Grade from baseline to 2 days after vaccination 1 were reported. Participants whose grade category was unchanged (e.g. normal to normal) were not reported.

Hematology parameters included hemoglobin, lymphocytes, neutrophils decrease, WBC decrease and WBC increase. Laboratory abnormalities were graded by FDA toxicity grading scale for healthy adult volunteers enrolled in preventive vaccine clinical trials as grade 1=mild; grade 2=moderate; grade 3=severe and grade 4=potentially life-threatening. Percentage of participants with shift in hematology values were reported in this outcome measure. Categories with at least 1 non-zero data values showing any shift in Grade from baseline to 1 week after vaccination 1 were reported. Participants whose grade category was unchanged (e.g. normal to normal) were not reported.

Chemistry abnormalities were graded by toxicity grading scale for healthy adult volunteers enrolled in preventive vaccine clinical trials as grade 1=mild; grade 2=moderate; grade 3=severe and grade 4=potentially life-threatening. Percentage of participants with shift in chemistry values were reported in this outcome measure. Categories with at least 1 non-zero data values showing any shift in Grade from baseline to 2 days after vaccination 1 (post-baseline) were reported. Participants whose grade category was unchanged (e.g. normal to normal) were not reported. The parameters reported were - Alanine Aminotransferase Increased (ALP), Alkaline Phosphatase Increased (ALP), Aspartate Aminotransferase Increased (AST), Creatinine Increased and Urea Nitrogen.

Chemistry abnormalities were graded by toxicity grading scale for healthy adult volunteers enrolled in preventive vaccine clinical trials as grade 1=mild; grade 2=moderate; grade 3=severe and grade 4=potentially life-threatening. Percentage of participants with shift in chemistry values were reported in this outcome measure. Categories with at least 1 non-zero data values showing any shift in Grade from baseline to 1 week after vaccination 1 (post-baseline) were reported. Participants whose grade category was unchanged (e.g. normal to normal) were not reported. The parameters reported were - Alanine Aminotransferase Increased, Alkaline Phosphatase Increased, Aspartate Aminotransferase Increased, Creatinine Increased and Urea Nitrogen.

An ECG abnormality was defined as any new abnormality that, as judged by a cardiologist, was consistent with probable or possible myocarditis or pericarditis, including: Sustained atrial or ventricular arrhythmias, Second-degree Mobitz Type II or worse atrioventricular block, new bundle branch block and Diffuse ST-segment elevation or PR-segment inversion, compatible with pericarditis.

An ECG abnormality was defined as any new abnormality that, as judged by a cardiologist, was consistent with probable or possible myocarditis or pericarditis, including: Sustained atrial or ventricular arrhythmias, Second-degree Mobitz Type II or worse atrioventricular block, new bundle branch block and Diffuse ST-segment elevation or PR-segment inversion, compatible with pericarditis.

Local reactions included pain at the injection site, redness and swelling and were recorded by participants in an electronic diary. Redness and swelling were measured and recorded in measuring device units, where 1 measuring device unit=0.5 cm. Redness and swelling were graded as mild (Grade 1): \>2.0 cm to 5.0 cm; moderate (Grade 2): \>5.0 cm to 10.0 cm; severe (Grade 3): \>10 cm; potentially life-threatening (Grade 4): necrosis or exfoliative dermatitis. Pain at injection site was graded as mild (Grade 1): did not interfere with activity; moderate (Grade 2): interfered with activity; severe (Grade 3): prevented daily activity and potentially life-threatening (Grade 4): emergency room visit or hospitalization for severe pain. Exact 2-sided confidence interval was based on the Clopper and Pearson method.

Local reactions included pain at the injection site, redness and swelling and were recorded by participants in an electronic diary. Redness and swelling were measured and recorded in measuring device units, where 1 measuring device unit=0.5 cm. Redness and swelling were graded as mild (Grade 1): \>2.0 cm to 5.0 cm; moderate (Grade 2): \>5.0 cm to 10.0 cm; severe (Grade 3): \>10 cm; potentially life-threatening (Grade 4): necrosis or exfoliative dermatitis. Pain at injection site was graded as mild (Grade 1): did not interfere with activity; moderate (Grade 2): interfered with activity; severe (Grade 3): prevented daily activity and potentially life-threatening (Grade 4): emergency room visit or hospitalization for severe pain. Exact 2-sided confidence interval was based on the Clopper and Pearson method.

Local reactions included pain at the injection site, redness and swelling and were recorded by participants in an electronic diary. Redness and swelling were measured and recorded in measuring device units, where 1 measuring device unit=0.5 cm. Redness and swelling were graded as mild (Grade 1): \>2.0 cm to 5.0 cm; moderate (Grade 2): \>5.0 cm to 10.0 cm; severe (Grade 3): \>10 cm; potentially life-threatening (Grade 4): necrosis or exfoliative dermatitis. Pain at injection site was graded as mild (Grade 1): did not interfere with activity; moderate (Grade 2): interfered with activity; severe (Grade 3): prevented daily activity and potentially life-threatening (Grade 4): emergency room visit or hospitalization for severe pain. Exact 2-sided confidence interval was based on the Clopper and Pearson method.

Local reactions included pain at the injection site, redness and swelling and were recorded by participants in an electronic diary. Redness and swelling were measured and recorded in measuring device units, where 1 measuring device unit=0.5 cm. Redness and swelling were graded as mild (Grade 1): \>2.0 cm to 5.0 cm; moderate (Grade 2): \>5.0 cm to 10.0 cm; severe (Grade 3): \>10 cm; potentially life-threatening (Grade 4): necrosis or exfoliative dermatitis. Pain at injection site was graded as mild (Grade 1): did not interfere with activity; moderate (Grade 2): interfered with activity; severe (Grade 3): prevented daily activity and potentially life-threatening (Grade 4): emergency room visit or hospitalization for severe pain. Exact 2-sided confidence interval was based on the Clopper and Pearson method.

Systemic events included fever, vomiting, diarrhea, headache, fatigue, chills, new/worsened muscle pain \& new /worsened joint pain \& recorded by participants in electronic diary. Fever defined as oral temperature \>=38.0 deg C \& categorized as \>=38.0 to 38.4 deg C, \>38.4 to 38.9 deg C, \>38.9 to 40.0 deg C \& \>40.0 deg C. Vomiting graded as: G 1: 1-2 times in 24 hrs; G 2: \>2 times in 24 hrs; G 3: required IV hydration; G 4: emergency room visit/ hospitalization for hypotensive shock. Diarrhea graded as: G 1: 2-3 loose stools in 24 hrs; G 2: 4-5 loose stools in 24 hrs; G 3: 6 or more loose stools in 24 hrs \& G 4: emergency room visit/ hospitalization. Headache, fatigue, chills, new/worsened muscle pain \& new/worsened joint pain: G 1: didn't interfere with activity; G 2: some interference with activity; G 3: prevented daily routine activity \& G 4: emergency room visit/ hospitalization. Exact 2-sided confidence interval based on Clopper and Pearson method.

Systemic events included fever, vomiting, diarrhea, headache, fatigue, chills, new/worsened muscle pain \& new /worsened joint pain \& recorded by participants in electronic diary. Fever defined as oral temperature \>=38.0 deg C \& categorized as \>=38.0 to 38.4 deg C, \>38.4 to 38.9 deg C, \>38.9 to 40.0 deg C \& \>40.0 deg C. Vomiting graded as: G 1: 1-2 times in 24 hrs; G 2: \>2 times in 24 hrs; G 3: required IV hydration; G 4: emergency room visit/ hospitalization for hypotensive shock. Diarrhea graded as: G 1: 2-3 loose stools in 24 hrs; G 2: 4-5 loose stools in 24 hrs; G 3: 6 or more loose stools in 24 hrs \& G 4: emergency room visit/ hospitalization. Headache, fatigue, chills, new/worsened muscle pain \& new/worsened joint pain: G 1: didn't interfere with activity; G 2: some interference with activity; G 3: prevented daily routine activity \& G 4: emergency room visit/ hospitalization. Exact 2-sided confidence interval based on Clopper and Pearson method.

Systemic events included fever, vomiting, diarrhea, headache, fatigue, chills, new/worsened muscle pain \& new /worsened joint pain \& recorded by participants in electronic diary. Fever defined as oral temperature \>=38.0 deg C \& categorized as \>=38.0 to 38.4 deg C, \>38.4 to 38.9 deg C, \>38.9 to 40.0 deg C \& \>40.0 deg C. Vomiting graded as: G 1: 1-2 times in 24 hrs; G 2: \>2 times in 24 hrs; G 3: required IV hydration; G 4: emergency room visit/ hospitalization for hypotensive shock. Diarrhea graded as: G: 1: 2-3 loose stools in 24 hrs; G 2: 4-5 loose stools in 24 hrs; G 3: 6 or more loose stools in 24 hrs \& G 4: emergency room visit/ hospitalization. Headache, fatigue, chills, new/worsened muscle pain \& new/worsened joint pain: G 1: didn't interfere with activity; G 2: some interference with activity; G 3: prevented daily routine activity \& G 4: emergency room visit/ hospitalization. Exact 2-sided confidence interval based on Clopper and Pearson method.

Systemic events included fever, vomiting, diarrhea, headache, fatigue, chills, new/worsened muscle pain \& new /worsened joint pain \& recorded by participants in electronic diary. Fever defined as oral temperature \>=38.0 deg C \& categorized as \>=38.0 to 38.4 deg C, \>38.4 to 38.9 deg C, \>38.9 to 40.0 deg C \& \>40.0 deg C. Vomiting graded as: G 1: 1-2 times in 24 hrs; G 2: \>2 times in 24 hrs; G 3: required IV hydration; G 4: emergency room visit/ hospitalization for hypotensive shock. Diarrhea graded as: G 1: 2-3 loose stools in 24 hrs; G 2: 4-5 loose stools in 24 hrs; G 3: 6 or more loose stools in 24 hrs \& G 4: emergency room visit/ hospitalization. Headache, fatigue, chills, new/worsened muscle pain \& new/worsened joint pain: G 1: didn't interfere with activity; G 2: some interference with activity; G 3: prevented daily routine activity \& G 4: emergency room visit/ hospitalization. Exact 2-sided confidence interval based on Clopper and Pearson method.

An AE was defined as any untoward medical occurrence in a participant temporally associated with the use of study intervention, whether or not considered related to the study intervention. Only AEs collected by non-systematic assessment (i.e, excluding local reactions and systematic events) were reported in this outcome measure.

An SAE was defined as any untoward medical occurrence that, at any dose, met one or more of the following criteria - resulted in death, was life-threatening, required inpatient hospitalization or prolongation of existing hospitalization, resulted in persistent or significant disability/incapacity, was a congenital anomaly/birth defect and was a suspected transmission via a Pfizer product of an infectious agent, pathogenic or non-pathogenic and other important medical event.

Percentage of participants reporting abnormal troponin I laboratory values 2 days after vaccination 1 were reported in this outcome measure.

Percentage of participants reporting abnormal troponin I laboratory values 2 days after vaccination 2 were reported in this outcome measure.

Percentage of participants reporting abnormal troponin I laboratory values 2 days after vaccination were reported in this outcome measure.

Percentage of participants reporting abnormal troponin I laboratory values 2 days after vaccination were reported in this outcome measure.

Twelve lead ECGs were performed after the participant had rested quietly for at least 10 minutes in a supine position. An ECG abnormality was defined as any new abnormality that, as judged by a cardiologist, was consistent with probable or possible myocarditis or pericarditis, including: Sustained atrial or ventricular arrhythmias, Second-degree Mobitz Type II or worse atrioventricular block, new bundle branch block and Diffuse ST-segment elevation or PR-segment inversion, compatible with pericarditis.

Twelve lead ECGs were performed after the participant had rested quietly for at least 10 minutes in a supine position. An ECG abnormality was defined as any new abnormality that, as judged by a cardiologist, was consistent with probable or possible myocarditis or pericarditis, including: Sustained atrial or ventricular arrhythmias, Second-degree Mobitz Type II or worse atrioventricular block, new bundle branch block and Diffuse ST-segment elevation or PR-segment inversion, compatible with pericarditis.

Twelve lead ECGs were performed after the participant had rested quietly for at least 10 minutes in a supine position. An ECG abnormality was defined as any new abnormality that, as judged by a cardiologist, was consistent with probable or possible myocarditis or pericarditis, including: Sustained atrial or ventricular arrhythmias, Second-degree Mobitz Type II or worse atrioventricular block, new bundle branch block and Diffuse ST-segment elevation or PR-segment inversion, compatible with pericarditis.

Twelve lead ECGs were performed after the participant had rested quietly for at least 10 minutes in a supine position. An ECG abnormality was defined as any new abnormality that, as judged by a cardiologist, was consistent with probable or possible myocarditis or pericarditis, including: Sustained atrial or ventricular arrhythmias, Second-degree Mobitz Type II or worse atrioventricular block, new bundle branch block and Diffuse ST-segment elevation or PR-segment inversion, compatible with pericarditis.