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).
Coronaviruses: Symptoms, Treatments and Variants. Coronaviruses are viruses, belonging to the subfamily Coronavirinae in the family Coronaviridae, that typically affect the respiratory tract of mammals, including humans - they are associated with the common cold, pneumonia and severe acute respiratory syndrome (SARS). The virus may also affect the gut.