The largest reduction in rate of transmission is when the infected person is wearing a mask. However if both the infected, and uninfected person are wearing mas

The largest reduction in rate of transmission is when the infected person is wearing a mask. However if both the infected, and uninfected person are wearing masts, it drops just a little bit lower. But you're right that if an unmasked infected person comes in contact with a masked healthy person, the masked person is still very likely to get infected.