For 35 days, participants were told to record any potential symptoms or soreness. Volunteers were also given a swab test for Covid-19 if they had any symptoms and were tested 35 days after their first injection.
At day 35, there were no serious or unusual adverse events. One person reported a mild fever that lasted for a day after the second shot. Otherwise, most didn't have any reaction at all, or if they did have a reaction, it was mild. Two people in two of the vaccine groups had headache, fatigue, and malaise for a median of two days or less. Two people from two of the vaccine groups had fatigue, malaise, and tenderness.
After the second vaccination, most people didn't have any problems, or they were mild. One person had tenderness after the second shot and eight had joint pain and fatigue.