Main Outcomes and Measures Participant-reported adverse effects and adverse effect severity. This analysis includes participants who provided consent between March 26, 2020, and May 19, 2021, and received at least 1 COVID-19 vaccine dose.Įxposures Participant-reported COVID-19 vaccination. Participants complete daily, weekly, and monthly surveys on health and COVID-19–related events. Objective To evaluate factors potentially associated with participant-reported adverse effects after COVID-19 vaccination.ĭesign, Setting, and Participants The COVID-19 Citizen Science Study, an online cohort study, includes adults aged 18 years and older with a smartphone or internet access. Importance Little is known about the factors associated with COVID-19 vaccine adverse effects in a real-world population. Shared Decision Making and Communication.Scientific Discovery and the Future of Medicine.
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