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COVID-19 immunity: how long does it last?


Millions of people across the world have been infected with SARS-CoV-2, the virus that causes COVID-19. Countries are also now embarking on massive vaccination campaigns to control the virus and protect their most vulnerable citizens. One of the biggest questions remaining is whether vaccination and/or prior infection with SARS-CoV-2 offers lasting protection against this deadly virus. The good news is that immunology is at last revealing some clues.
To understand whether immunity is possible – and why this has even been questioned – it is important to consider the nature of SARS-CoV-2. It is a betacoronavirus, and several betacoronaviruses already circulate widely in humans – they are most familiar to us as a cause of the common cold. However, immunity to cold-causing viruses is not long-lasting, leading many researchers to question whether longer-term immunity to SARS-CoV-2 is possible. ....

United Kingdom , Sheena Cruickshank , Christoph Burgstedt Shutterstock , Professor In Biomedical Sciences , University Of Manchester , Biomedical Sciences , Creative Commons , ஒன்றுபட்டது கிஂக்டம் , ஷீனா கிருத்திக்க்ஷன்க் , ப்ரொஃபெஸர் இல் உயிர் மருத்துவ அறிவியல் , பல்கலைக்கழகம் ஆஃப் மான்செஸ்டர் , உயிர் மருத்துவ அறிவியல் , படைப்பு காமன்ஸ் ,