Yeah that is true but when a few nations see that a particular nation is suffering from a pandemic then some cheap mentality enables them to attack the weaker opponent and kill it eventually. I myself do not see any wars happening anytime soon because actually corona virus is now a little bit under control with various vaccines being tested daily.
I personally feel like China could have saved the world had it taken proper measures and stop the spread from their country because if they had stopped trades across borders and any movement from outside the China was limited the world would have been a better place than it is right now.
I do not see any world war but China might want to initiate one looking at a few weaker nations being already affected by the virus.
It is going to be worst for the country that will start it because the world will not be happy with them for attacking a weak country during a time like this when countries are struggling, and the situation is even worst in the developing countries which are probably the weak countries here. And moreover, nobody wants a war now unless they having some serious mental problems.