India's first human metapneumovirus (HMPV) cases confirmed, but officials say "no reason to worry"
Briefly

Health experts have clarified that the HMPV is not a new virus; it was first identified in 2001 and it has been circulating in the entire world for many years.
This has been circulating for a while, so people have some immunity. The virus is fairly stable, unlike the COVID-19 virus that mutates often, making it harder to fight.
Read at Cbsnews
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