cigarettes prevent covid Smoking or vaping may put people into higher risk of COVID-19 World No Tobacco Day 2020:

"Lungs of a what

66 In addition, PGE 2 is produced by DCs themselves in response to cigarette smoke extract in vitro in which it preferentially primes Th2 cells by acting in an autocrine way

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But it shouldnt be the main way to stay at a healthy weight

Its not all been backsliding: a notable step forward in tobacco control came in 2020 when China incorporated a smoking ban for minors into law, which includes prohibiting cigarette sales near schools