Far from stopping the spread of covid-19, lockdowns, only push deaths into the future. Unless a vaccine is imminent or a 100 percent total lockdown is imposed, lockdown won't cause big reductions in total deaths.
Since the trade balance has nothing to do as such with either the supply of money or the demand for money, we can conclude that trade balances do not determine the purchasing power of money of respective countries.
We are fortunate to have vaccines as options in many cases. But mandatory vaccination can never be justified. If a vaccine were clearly 100 percent efficacious and 100 percent safe, there would be no need for coercion; people would voluntarily line up to take it.