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January 28, 2021
HARLOW, UK: Now that many questions regarding COVID-19, including its symptoms, risks and recovery time, have been answered, researchers are faced with a new dilemma: SARS-CoV-2 reinfection and immunity. Although unusual, it is evident that reinfections do occur, and in a recent study, researchers explored whether individuals who have recovered from COVID-19 are protected from future infection. The findings suggested that past infection may provide natural immunity and that the said immunity is effective for approximately half a year after the initial infection.
In what is considered to be the largest study of SARS-CoV-2 reinfection, researchers in the UK recruited 6,614 healthcare workers. They received SARS-CoV-2 polymerase chain reaction and antibody testing every two to four weeks and completed questionnaires on their symptoms and exposures every two weeks. The researchers found that approximately 83% of the participants who had a prior history of SARS ....

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