People should stop using the cutlery/chopsticks they put in their mouths to get food from common dishes
But ALWAYS ask for serving spoons/forks/whatever for the shared dishes.
NEVER use or allow others at your table to use the cutlery/chopsticks they eat with to take food from the common dishes.
Except, if you have to, at home within your immediate family.
Even if in some places it’s traditional to do so, I say: some traditions are no good; they need to be banished!
Maybe the spread of the Corona Virus COVID-19 would slow down, and in fact many other diseases may be spread through this practice.