A widely shared social media post includes a graph of the low rate of flu infections in the 2020-2021 flu season, implying that the missing cases were being counted as COVID-19 infections.
Recommendation: 
Misleading claim circulates that updated COVID-19 vaccines are untested
Several popular vaccine opponents claim that the updated COVID-19 vaccines were not properly safety tested in humans, specifically emphasizing that Pfizer’s vaccine was tested in