Yes...Like a virus happiness can be infectious.
So can misery!
You do have choice in what you want to spread.
You can bring happiness to your outer experiences, or you can try to extract it from the world. But if your world isn't spreading happiness at the moment, do you stay miserable?... or do you start a happiness epidemic?
I once read a saying that stayed with me. A saying which seems applicable here (sorry don't know who said it).
"You live FROM happiness, rather than FOR happiness."
So if you really want to live, be a happiness germ!!!
Have a great week.