Before there are lack of medical supplies like face mask and face shield where the demand is so high, that time is the best time to create a manufacturing company because you can get huge sales due to the high demand and also due to the high pricing strategy.
The problem with such businesses is that you are relying that the virus will stay for long period because face masks and sanitizers are items which won't be in demand at all once the virus comes to an end and you would have invested money already in manufacturing so you will have to sell them somehow.
The better idea would be to look for opportunities such that they exist now in pandemic times but also have a decent future like the online shopping idea above.