I guess this is what happenes in the pre-quel to I Am Legend.
http://www.msn.com/en-ca/news/world/...P37?ocid=ientp
Putin Approves
How well does it work?
Experts say they don’t really know how safe or effective the Sputnik V vaccine is.
According to Putin, the vaccine underwent the necessary tests and was shown to provide lasting immunity to the coronavirus. One of his own adult daughters has received the shot, he said.
“I know it has proven efficient and forms a stable immunity,” he said. “We must be grateful to those who made that first step very important for our country and the entire world.”