A US study showed the side effects of the third dose of the vaccine

The US Centers for Disease Control and Prevention (CDC) report is based on reports from more than 22,000 people who have registered on a mobile application for vaccine safety and received a supportive dose between August 12 and September 19.

During this period, the third dose was allowed for people who are immunocompromised (have weakened or impaired immunity) but not for

Similar to after the second dose

“The frequency and type of side effects were similar to those seen after the second dose of the vaccine, and were mostly mild to moderate and short-lived,” . , CDC Director Rochelle Walenská said at the press briefing.

Frequently reported side effects included injection site pain (71 percent of participants), fatigue (56 percent), and headache (43 percent).

Approximately 28 percent of people reported not being able to perform normal daily activities, usually the next day after receiving a support dose.

Approximately two percent of participants sought health care and 0.1 percent, or 13 people, were hospitalized.

The first doses had less significant side effects

The subgroup almost The 21,700 people who received the same mRNA vaccine (from Moderna or Pfizer / BioNTech) at all three doses were further analyzed

People who received Modern had localized reactions (limited to one site) – such as upper arm pain – a little more often after the third dose than after the second dose

System reactions – ie those, kt ores occur outside the injection site – they were slightly less common after the third dose than after the second

The same pattern occurred with the vaccine from Pfizer. And for both vaccines, their first doses caused significantly less frequent side effects, especially systemic, than the second and third doses.

Last week, the authorities extended the Pfizer support benefit to people over the age of 65, to people aged 18 to 64 with diseases other than diabetes or obesity, and to those who are particularly exposed to the coronavirus, such as at work or in the workplace.

The CDC has pointed out that its administration has certain limitations. For example, volunteers reported to the “v-safe” application and participants were mostly white compared to the general population.

During People who are not immunocompromised but were afraid of weakening their immunity may also have received a booster dose during the study period. Therefore, the findings are not completely 100% limited to immunocompromised people.

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