Table 2

Proportion of participants explicitly reporting no adverse event and the maximum self-assessed severity of adverse events in participants who did report them

Post-vaccination periodParticipants submitting follow-up reports during time periodParticipants reporting at least one event (% of participants)
Maximum self-assessed severity of any event
None*MildModerateSevereHospitalisedUnknown†
Week
 1510389.611.234.591.120.083.37
 2271491.60.593.541.550.152.58
 3637492.630.20.50.20.036.43
 4679894.670.190.40.150.034.56
Month
 2847993.250.471.240.660.194.19
 3719994.370.260.580.530.074.18
 4773495.510.130.430.320.043.57
 5689895.070.351.090.750.192.55
 6490995.250.290.510.330.123.5
0–180 days, or last follow up if earlier
Overall10 78877.381.214.151.370.1815.71
  • *Answered ‘No’ to the question, ‘Have there been any significant changes in your health and wellbeing for any reason (including any that you think may have been due to COVID-19 vaccination)?’ on every occasion in the period.

  • †Answered 'Yes' but did not record any symptoms.