Are planes safe during COVID?

Copper has been known about since the 1700's at least, they covered the bottom of the fleet of ships, not just for the smoothness, but to stop barnacles and shipwroms sticking to it.
It's also known that door handles with copper in them (real brass) also helped with reducig the spread of infection
Did anyone notice the incorrect way to change the filter ?
(remove filter, put the grille back, open grille, insert new filter)