On one hand, the contagious incubation period of SARS-CoV-2 is said to be up to 21 days. So no new cases of COVID-19 is not surprising.
On the other had, if people are safely increasing their exposure to sunlight, increasing their resistance to virus with vitamin D3 by doing so, then we may be in new stage of pandemic in my non-medical opinion.
Corrections, insights welcome.
Most data I’ve seen is an incubation period of 2 - 14 days with usual about 5 days.
No correction per se, but 21 days is the outside length. From what I’ve read, the common onset period is 4-7 days.
I’m also reading things that seem to point at something else interesting. The shorter the time before onset, the more serious the case tends to become. The longer until onset, the less serious the case becomes.
Nothing scientific, just anecdotal, like so many things about this virus.