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Fever"},{"categories":[{"measurements":[{"groupId":"OG000","value":"0"},{"groupId":"OG001","value":"0"},{"groupId":"OG002","value":"1"},{"groupId":"OG003","value":"1"}]}],"title":"Day 29 - Chills"},{"categories":[{"measurements":[{"groupId":"OG000","value":"1"},{"groupId":"OG001","value":"0"},{"groupId":"OG002","value":"0"},{"groupId":"OG003","value":"0"}]}],"title":"Day 29 - Arthralgia/joint pain"},{"categories":[{"measurements":[{"groupId":"OG000","value":"0"},{"groupId":"OG001","value":"0"},{"groupId":"OG002","value":"5"},{"groupId":"OG003","value":"1"}]}],"title":"Day 29 - Malaise/fatigue"},{"categories":[{"measurements":[{"groupId":"OG000","value":"1"},{"groupId":"OG001","value":"0"},{"groupId":"OG002","value":"3"},{"groupId":"OG003","value":"3"}]}],"title":"Day 29 - Myalgia/body aches"},{"categories":[{"measurements":[{"groupId":"OG000","value":"1"},{"groupId":"OG001","value":"1"},{"groupId":"OG002","value":"3"},{"groupId":"OG003","value":"2"}]}],"title":"Day 29 Headache"},{"categories":[{"measurements":[{"groupId":"OG000","value":"0"},{"groupId":"OG001","value":"0"},{"groupId":"OG002","value":"1"},{"groupId":"OG003","value":"0"}]}],"title":"Day 29 - 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A physical exam will be performed to assess general physical condition in the following areas: supraclavicular and axillary lymph nodes, cardiovascular, pulmonary, abdomen and skin and include an assessment of pain, tenderness, erythema, induration and warmth at the injection site, fever, chills, arthralgia/joint pain, malaise/fatigue, myalgia/body aches, headache, nausea, vomiting, and abdominal pain following vaccination.","groups":[{"description":"100 mcg (0.5 mL) messenger ribonucleic acid (mRNA)-1273 injection, intramuscular (IM) on days 1 and 29; with option for subsequent booster dose, 100 mcg (0.5 mL) mRNA-1273 injection (IM) no less than 4 weeks after day 29.","id":"OG000","title":"Hematologic Low Immunosuppression - Initial Phase"},{"description":"100 mcg (0.5 mL) messenger ribonucleic acid (mRNA)-1273 injection, intramuscular (IM) on days 1 and 29; with option for subsequent booster dose, 100 mcg (0.5 mL) mRNA-1273 injection (IM) no less than 4 weeks after day 29.","id":"OG001","title":"Hematologic Intermediate Immunosuppression - Initial Phase"},{"description":"100 mcg (0.5 mL) messenger ribonucleic acid (mRNA)-1273 injection, intramuscular (IM) on days 1 and 29; with option for subsequent booster dose, 100 mcg (0.5 mL) mRNA-1273 injection (IM) no less than 4 weeks after day 29","id":"OG002","title":"Hematologic High Immunosuppression - Initial Phase"},{"description":"100 mcg (0.5 mL) messenger ribonucleic acid (mRNA)-1273 injection, intramuscular (IM) on days 1 and 29; with option for subsequent booster dose, 100 mcg (0.5 mL) mRNA-1273 injection (IM) no less than 4 weeks after day 29.","id":"OG003","title":"Solid Tumor on Programmed Cell Death protein1/Programmed Cell Death Ligand 1 Inhibitor-Initial Phase"}],"paramType":"COUNT_OF_PARTICIPANTS","reportingStatus":"POSTED","timeFrame":"End of 15-minute observation period following each vaccination on Day 1 and Day 29","title":"Number of Participants With Reactogenicity of Messenger Ribonucleic Acid (mRNA)-1273 Vaccine: Initial Phase","type":"PRIMARY","unitOfMeasure":"Participants"}