Sense of proportion required
The OP refers to Covid19 as the biggest 'health emergency' of the last 100 years. Really? Can we take it then that he does not believe that the people dying in far greater numbers from other causes somehow don't count. How about deaths resulting from obesity, alcohol abuse,drug abuse, painkiller addiction, smoking, cancer in all it's forms , malaria etc etc...
There is no question that Covid19 is extremely nasty and will kill thousands but, against a background death rate of all those listed above (and many others) it is really not worth destroying or economy and disrupting our lives so that we can kid ourselves that we can hide from it or fix it. The virus is here now and is here to stay. If it's a question of mankind vs nature, nature will win every time.