I was responding to someone in London saying they don't see most people wearing masks in public places. They didn't explicitly say it was enough, but since that was their main criticism of how London is responding, it read like that.

Here's what Biden said:

> The first day I'm inaugurated to say I'm going to ask the public for 100 days to mask. Just 100 days to mask, not forever. One hundred days.

Again, he didn't say that wearing a mask is enough, but with the 100-day timeline, reading between the lines, he's saying it will drive down the case count.