add a comment |. up vote 1 down vote. If a game has a value, it need not to have a mixed strategy Nash equilibrium. In the Von Neumann's Minimax theorem stated above, it is assumed that, for each player, the set of mixed strategy best responses is nonempty given the other player's mixed strategy.
Not all RNA viruses are retroviruses, e.g., the measles virus and flu virus are RNA viruses, but not retroviruses. There are three families of retroviruses: oncoviruses (causing cancer), lentiviruses (slow viruses, of which HIV is one), and foamy viruses or spumaviruses (about which much less is known).
Viruses that can give rise to viral arthritis include the following: 1  Parvovirus B19. 2  Hepatitis viruses ( hepatitis A virus [HAV], hepatitis B virus [HBV], and HCV) 3  Rubella virus.  Alphaviruses and 1  flaviviruses. Retroviruses.