People may only need a shot of COVID-19 vaccine if previously infected

People may only need a shot of COVID-19 vaccine if previously infected.   Studies have shown that people who have previously been infected with new coronavirus pneumonia may only need a shot of the vaccine.

A study published on Monday showed that after only one dose of the COVID-19 vaccine, the antibody levels of previously infected people were equal to or higher than those of people who had never been infected after two injections.

The researchers wrote that those who had previously been infected with the virus appeared to have a wider range of side effects after the first injection, such as fatigue, fever, and muscle pain-similar to what other participants might experience after the second injection of the mRNA vaccine. Side effects.

The authors of this non-peer-reviewed preprint study believe that changing the policy of giving these people only one dose of vaccine will “free them from unnecessary suffering and release many much-needed vaccine doses.”

Research method: This study involved 109 vaccinated people, 41 of whom had previously been infected with the virus.

The study did not specify which vaccine the subjects received or how severe they were when they contracted the virus.

Researchers say people who have not been previously infected show a “relatively low” antibody response in the first 9 to 12 days after vaccination.

People with a history of infection quickly develop high antibody titers within “a few days”, and the titer is sometimes 10 to 20 times higher after testing.

This study did not prove whether this can bring greater protection from infection, and follow-up research is still ongoing.

The US Centers for Disease Control and Prevention said that even if they have had COVID-19, they should be vaccinated because it is not clear how long the antibody protection will last.

(source:internet, reference only)

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