- HD 1080
- Runtime: 94m.
- Status: Released
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- Languages: en
- Country: United States of America
- Director: George Seaton
- Stars: George Peppard, Mary Tyler Moore, Dom DeLuise, John McMartin, Nathaniel Frey
- keywords: quarantine, mutation, outbreak, vaccine, epidemic, medical research
- Production_studio: Universal Pictures
- The What's So Bad About Feeling Good? is featured in the top rankings of 1968
- #26 in Top Comedy Movies of 1968
A new infection that simply makes people feel happy is treated as a threat by the authorities while its "victims" work to spread it to others.