A disease escaping from a bacteriological laboratory has killed many people. Surviving people were hiding from the virus at home. But it turned out that the virus not only killed people, but also turned them into the living dead. Zombies began to catch the survivors. So far, everyone has not turned into a zombie; you need to find a vaccine against a dangerous virus. You have recovered to the place of the former laboratory. Find the vaccine and kill as many zombies as possible.