That "conventional wisdom" or "rule" -- if it is one -- obviously does NOT apply to many ads for vaccines, especially lately. Take, for example, the TV ad for Trumenba - Pfizer's Meningitis B vaccine. I saw this ad for the first time last night:
As described by iSpot.tv (here) the Trumenba ad "follows the series of events that lead up to this young man being in a hospital with Meningitis B. The source of the infection is traced back to a party where the teenager shared food, drinks and a kiss with friends. Trumenba offers a vaccine to prevent future spread of the disease." Bummer! You can't even enjoy an innocent kiss without fearing for your life! This is obviously a "dark" and scary ad aimed at the parents of teenagers for whom this vaccine is indicated (up to age 25).
Why are scare tactics the marketing strategy du jour in branded and unbranded vaccine ads?