There are a lot of  reasons to expect that smoking would make COVID-19 worse.  Kade Patanavanich and have completed a meta-analysis of 12 papers that present evidence on disease progression among people who have been diagnosed with COVID, 10 from China, 1 from Korea, and 1 from the USA.  We found that the odds of disease progression were more than doubled. These papers all have limitations, most notably the fact that they are almost certainly missing a lot of smokers in their patient histories. This limitation will lead to the risk being underestimated.

 

 

Credit: iStock, South_agency

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