Testing Effectiveness of Vaccine In a USA Today article about an experimental nasal spray vaccine for children, the following statement was presented: “In a trial involving 1602 children only 14 (1%) of the 1070 who received the vaccine developed the flu, compared with 95 (18%) of the 532 who got a placebo.” The article also referred to a study claiming that the experimental nasal spray “cuts children’s chances of getting the flu.” Is there sufficient sample evidence to support the stated claim?