A virus walks into a bar. The bartender says:" We don't serve viruses." The virus takes over the bartender, and says "Now, we do."
Two bacteria walk into a bar. The bartender says:" We don't serve bacteria." The bacteria say "It's ok, we work here. We are Staph (staff)."
The most funny one is the last one. The Shrodinger's cat walks into a bar.. It doesn't.