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The World Health Organization (WHO) has confirmed that new data suggests that people who have already been infected with COVID-19 may be susceptible to secondary infections as the antibodies die off.
“We have seen the number of people infected continue to rise, but we are also seeing data emerging that the protection may not last a lifetime, and as a result, we may see re-infections starting to occur,” Mike Ryan , executive director of the WHO health emergency program, told me by CNBC. “So the question is: what are the levels of protection in society?”
WHO researchers are currently working to determine the lifespan of antibodies in response to COVID-19 in the human system.
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Previous studies suggested that antibodies produced in reaction to a COVID-19 viral particle can last up to five months. This would imply a longer delay of potential immunity after infection with COVID-19.
“What we understand is that 90 to 100% of people infected with the coronavirus develop an antibody response, whether you have a mild infection, an asymptomatic infection up to a serious infection”, Maria Van Kerkhove, disease manager emerging diseases and zoonoses at WHO. unit, said.
Another study by Oxford University Hospitals reportedly found that people who contracted the virus are “highly unlikely” to contract the virus again.
For those who had a second infection, symptomatic infections were more commonly seen in patients who did not have antibodies.
“In some people it may subside after a few months, but we get a good indication that the natural immune response to infections lasts for a few months,” Van Kerkhove added. “We are about a year into this pandemic, so we still have a lot to learn.”
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