Vaccine, an Uncommon card

The card carries these facts from its Wikipedia article.

• The safety and effectiveness of vaccines has been widely studied and verified.
• A vaccine typically contains an agent that resembles a disease-causing microorganism and is often made from weakened or killed forms of the microbe, its toxins, or one of its surface proteins.
• The agent stimulates the immune system to recognize the agent as a threat, destroy it, and recognize further and destroy any of the microorganisms associated with that agent that it may encounter in the future.

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Vaccine article was read about 170,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 90 and blocks with 90: each hit it takes is cut by 36 %.

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 Vaccine in the power ranking, all domains together.