Health
Why a vaccine can provide better immunity than an actual infection – The Conversation UK
A few people have developed COVID-19 twice. That doesn’t mean a vaccine can’t offer long-term protection.

Two recent studies have confirmed that people previously infected with SARS-CoV-2, the virus that causes COVID-19, can be reinfected with the virus. Interestingly, the two people had different outcomes. The person in Hong Kong showed no symptoms on the second infection, while the case from Reno, Nevada, had more severe disease the second time around. It is therefore unclear if an immune response to SARS-CoV-2 will protect against subsequent reinfection.
Does this mean a vaccine will also fail …
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