International
A year after COVID-19 first tore through Italy's Lombardy region, those who tested positive during the first wave have been significantly less likely to catch it again. Researchers followed 1579 people who tested positive for COVID-19 in early 2020, following up at least six months later. Just under one in 300 people in the group had been reinfected in that time. Over the same period, one in 25 people in a group of 13,496 who did not test positive early in the pandemic had since been infected for the first time.
From:
What The Study Did: Study results suggest that reinfections are rare events and that patients who have recovered from COVID-19 have a lower risk of reinfection. However, the observation ended before SARS-CoV-2 variants began to spread, and it is unknown how well natural immunity to the wild-type virus will protect against variants.
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