Remote learning, hybrid models, smaller class sizes - a lot transmitted in schools. Early season numbers for vaccinations against the flu were double what they were last year at the same time.
'New data from the health IT firm IQVIA finds that 23.5 million people got the flu shot from Aug. 7 through Oct. 2, compared with 12.6 million during the same timeframe in 2019.'
You then must be assuming the most vulnerable to the seasonal flu were heavily represented in the additional 10.9 million who sought out the flu vaccine this year.