Article Notes
Article pearls, summaries and comments.
See the more recent 2022 article, Return to exercise post-COVID-19 infection: A pragmatic approach in mid-2022, which also sets out a graduated return to exercise, though is perhaps even more pragmatic.
The usual 'correlation is not causation' qualifier is very necessary here. Perhaps doubly-so because this is a meta-analysis using pooled data of over 1 million people.
It's completely possible that someone who chooses to receive an influenza vaccine is also someone who makes more cautious health decisions and is more risk-averse, reducing their COVID exposure risk. The vaccinated are also more likely to be from better health-serviced locations and probably from higher socio-economic groups.
Still, interesting association nonetheless.