Let me explain the concept of incidence and prevalence.
Incidence is the new cases occurring in that period, whereas prevalence is the cumulative cases existing during that period. If I presume the incidence at the time of collection of the swab is 10,000, and the asymptomatic is 5x to 10x (let us call it A), the total burden of positive cases is in that proportion.
If we are to presume the disease persists for 14 -21 days in its mild form, then the prevalence now is 14x-21x the multiple of A. If I go by some researchers, the asymptomatic shed the virus for 21-28 days.
That’s the total burden of test-positive cases.
Airborne precautions are likely to be scaled up on the risk stratification. All those risk color charts floating around are likely unreliable for this simple reason. To make it simple, I will just make two categories –
Non-essential are all those without which we can survive.
You may naturally ask, until when should we live like this? It’s not too long, vaccines and drugs are on the horizon. Also, though the virus is still aggressive, it will likely become less aggressive in the future. So, let’s wait before taking an unrequired risk.