Are you immune to Covid-19 for three months after recovering? It's not clear

Image: Marc Tran / Stocksy United
It’s the question everyone wants answered: How long are we protected from catching Covid-19 after we’ve recovered from the novel coronavirus — and what does that really mean? “People who have tested positive for COVID-19 do not need to quarantine or get tested again for up to 3 months as long as they do not develop symptoms again,” the CDC guidance stated.Our adaptive immune system, designed to target a specific and previously recognized invader, contains two main cellular components — B cells and T cells. A pre-print paper (meaning it has not been published in a peer-reviewed journal) released in July found antibody responses appear to decline 20 to 30 days after Covid-19 symptoms first appear.”This study has important implications when considering protection against re-infection with SARS-CoV-2 and the durability of vaccine protection,” the researchers wrote in the paper.In early July, a Spanish government study found that just 5% of people in Spain have coronavirus antibodies and in a potentially worrying development, the study also indicated that people’s immunity to coronavirus wanes after just a few weeks. The other four cause the common cold, and because they circulate widely each year, it’s possible many people may have already been exposed to one of these so-called “cousins” of the novel coronavirus .”They’ve been studied and we know that after you had a cold, you develop antibodies to that particular human strain of coronavirus and you will be protected, but it turns out the protection begins to wane after about a year,” Schaffner said.

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