That doesn't consider the possibly of a significant portion of the population infecting themselves. Remember, most people do not have the training to make a pro

That doesn't consider the possibly of a significant portion of the population infecting themselves. Remember, most people do not have the training to make a proper mask and use it correctly. That's the reason we need randomized trials. How do masks work outside of the lab? Also, it isn't accepted science that Covid-19 infects through aerosols.