I guess one could do a meta-study about the lack of influenza. Several things come to my mind: Isolation by lock-down, or general avoidance of strangers, eati

I guess one could do a meta-study about the lack of influenza. Several things come to my mind: Isolation by lock-down, or general avoidance of strangers, eating/going out, masses of people, limiting in person shopping, remote work, avoiding public transportation. Validity of numbers, prioritization of tests.