We can observe that, as the acute inflammations of childhood are avoided, chronic immune disorders take their place. The 2007 asthma guidelines from the US Department of Health and Human Services show that certain infections in childhood reduce the incidence of asthma: measles and hepatitis A amongst them. When these are avoided with a vaccine, the asthma prevention is lost. Almost everyone gets exposed to hepatitis A in developing countries. The usual immunity rate is 90%. Most interesting, children under 6 usually have no symptoms at all with an infection of hepatitis A. Complications are rare in hepatitis A at all ages. Survival rate is greater than 99.9%. Asthma, on the other hand, is increasing in incidence, carries with it substantial morbidity, is a major financial burden to the healthcare system, and has links to autism.