Masks!
Masks. Was it weird to you guys that medical professionals all over the news discouraged people to wear masks when going outside? The explanation was that particles can still get in from the side of masks so it's not very effective. But I'm thinking at least it can stop the majority of things..
The doctors probably discouraged people from wearing masks because of mask shortages, to prevent panic buying, which totally makes sense. What they should have done is to tell us how to make our own, it's very easy DIY, can make it with t-shirt, coffee filter, etc.
I think one reason why some countries close to china were successful in containing the virus is people wearing masks, like Taiwan, Singapore, HK. What's happening now in Czech Republic is that the government has made mask-wearing mandatory. Of course it's not 100% effective, but it does help a lot, it's not useless. It's not a substitute for physical distancing, which still needs to be done.
I'll make a bold prediction, in the coming weeks, everyone will be wearing masks on the street.