What are things they might do that reduce their risk? These people are all visiting their doctor regularly. Discovering that thing would be worth a lot, if it e

What are things they might do that reduce their risk? These people are all visiting their doctor regularly. Discovering that thing would be worth a lot, if it existed, because we don't know of anything. Just doing things that might make them more at risk of tetanus, diphtheria, or pertussis -- hiking? -- would not account for a 40% effect. The key point for us is, how good does your reason for getting your Tdap booster need to be? Medical researchers have other things that should attract their attention here, and work to do, but that is not our business.