I do not think that masks alone will be effective but in combination with other measures they will have an effect. Ok, say most people fail to use masks to pro

I do not think that masks alone will be effective but in combination with other measures they will have an effect. Ok, say most people fail to use masks to protect themselves (they take masks under their skin for example) but how does it affect protecting other people? Considering that many cases are first asymptomatic then wearing masks may considerably limit the spread.