The vaccines are very protective against severe disease, not "useless". Of course that is more important for people over 40 or 50 where severe disease is more c

The vaccines are very protective against severe disease, not "useless". Of course that is more important for people over 40 or 50 where severe disease is more common. For younger people, they don't completely stop transmission, but it's very likely that they slow it down (preventing some infections, lessening the severity of others, etc).