Influenza A virus, a Rare card

The card carries these facts from its Wikipedia article.

• Strains of IAV circulate constantly in bats, pigs, horses, and dogs, while other mammals may be infected occasionally.
• It has also been the cause of a number of pandemics, most notably the Spanish Flu pandemic from 1918–1920.
• Subtypes of IAV are defined by the combination of the molecules on the surface of the virus which provoke an immune response, for example, "H1N1" denotes a subtype that has a type-1 hemagglutinin protein and a type-1 neuraminidase protein.

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Influenza A virus article was read about 260,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 79 and blocks with 99: each hit it takes is cut by 40 %.

Open packs. Each pack holds five cards drawn from real Wikipedia articles, the rarest last, and the fifth card is always Rare or better. The odds are shown in the game. A free pack arrives every hour and two can wait, and the Coins you win in duels buy more packs.

The cards just above and just below Influenza A virus in the power ranking, all domains together.