"You may as well as just seed viruses everywhere" A virus needs a host cell to replicate, so they likey would not get far. But bacteria survive in space quite

"You may as well as just seed viruses everywhere" A virus needs a host cell to replicate, so they likey would not get far. But bacteria survive in space quite well, and I would just send them. Or like you said, maybe some asteroid with bacterias was send to us on purpose and got successful.