For the mathematically-minded, it is worth noting that the Asian flu had an R naught of 1.7 while Covid had an R naught of a bit more than 2. Keeping in mind these are fat-tailed distributions. So an R naught of 2 is a estimate of a true R naught, and because using sample averages to estimate means (true R naught is a mean) is unstable (the fatter the tail, the less moments of the distribution there are), once the re…
The infection rate is always conjectural, not really empirical. It’s impossible to discern without universalized, random, and thoroughly accurate testing, tracing, and tracking. Those conditions have never been met in any country or any pandemic. So what seems to be a measure of an existing reality is really true only in theory, not realistically discernible in the midst of a pandemic. At best, it is an estimate.
Masks are ineffective at lowering the R Naught. Social Distancing might.