Why did God let coronavirus happen?

How could a loving, just, and powerful God allow a tragedy like the coronavirus pandemic? Doesn’t he care that innocent people are suffering and dying? It seems unjust. If God exists, isn’t he strong enough to stop this madness?

There were once two young brothers who were always getting into trouble. Their parents invited the pastor over, hoping a dose of religion could get them to shape up. The minister began by addressing the younger brother in the living room, while the older remained upstairs.