Ah, your data is well out of date.
This isn’t hysteria, and I don’t think hysteria is called for.
If smallpox had these numbers, well, that is a different story. But smallpox has had likely thousands of years to evolve higher infectivity, and seems to have reached a local maxima that isn’t there. Covid still has time to explore options.
Measured R0 in New York for COVID was 6.4 [https://www.medrxiv.org/content/10.1101/2020.05.17.20104653v...] for the original strain before lockdown and masking.
Those appear to have greatly reduced the basic replication rate to around .9-1.3 or so shortly afterwards. As they are very severe countermeasures, it’s disingenuous to use the reduced replication rate ‘raw’ as no one is going to be doing them ‘naturally’.
The delta variant (B.1.617.2), now dominant in California and elsewhere, is approximately 2x more infectious than that original variant from the data I’ve found, which is limited [easiest thing I could fine here was https://www.npr.org/sections/goatsandsoda/2021/05/07/9947104...].
That would put it (in a ‘natural’ setting) at R0 being roughly 12-13. Measles is estimated to have a R0 of 12-18. [https://pubmed.ncbi.nlm.nih.gov/28757186/]
Outdoor infection IS less likely - this study of infected construction workers show only 1.4% of their outdoor only co-workers were infected by infected workers, where 43% of people they lived with and 26% of people they had indoor contact with while working got infected. There are many documented cases of outdoor infections, and even more where no known source could be found and all indoor or other sources were ruled out.
New variants driving up infectivity will of course drive this number up over
time if infections are allowed to spread (albeit hopefully vaccination can cut it off at the knees).
What does this mean? Without a vigorous public health response, Covid will continue to spread. It may continue to spread despite a very rigorous response from authorities because the body count is going to be low enough that many people just won’t care.
If we get an unfortunate deadlier variant, then maybe that will change. But one thing appears sure - we’re past the point (if there ever was one) where there is anything easy or pleasant that is going to happen.