Most side effects after the third dose of COVID vaccine are mild or moderate and occur about as often as after the second dose.
The US Centers for Disease Control and Prevention (CDC) report came from more than 22,000 people who signed up for the Vaccine Safety Smartphone App and received booster shots between August 12th and September 19th.
During this time, a third dose was granted to people with weakened immunity but not in the wider population.
“Frequency and type Side effects Similar to what was seen after the second vaccination, most were mild or moderate and short-lived, “CDC director Rochelle Walensky said at a press conference.
Frequently reported adverse reactions included injection site pain (71% of study participants), malaise (56%), and headache (43%).
Approximately 28% reported that they were usually unable to perform normal daily activities the next day.
About 2% of participants sought medical care, and 0.1%, or 13 people, were hospitalized.
A subset of nearly 21,700 people who received the same mRNA vaccination Further analysis was performed on all three doses (Moderna or Pfizer).
Local reactions such as arm pain were reported to be slightly more common after the third dose compared to the second dose among those who received Moderna.
Systemic reactions (meaning reactions that occurred outside the injection site) were slightly less frequent after the third dose compared to the second.
The same pattern occurred with Pfizer, and in both cases the first shot had a significantly reduced frequency of systemic side effects, especially compared to shots 2 and 3.
Last week, the U.S. Health Agency released a Pfizer booster for people over the age of 65, people aged 18-64 with underlying illnesses such as diabetes and obesity, and people who are particularly exposed to the virus because of their work or place of residence. Expanded dose approval.
The CDC warned that the report had certain restrictions.
These include the fact that you sign up for Smartphone app What was called “v-safe” was voluntary and the participants were much more white than the public.
During the study period, I was worried about weakened immunity, so it is possible that some non-immunized people with weakened immunity received unrecommended boosters. Therefore, it is not possible to reliably relate the findings to only those with weakened immunity.
© 2021 AFP
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