Positive effect of childhood diseases

Chickenpox
May 15, 2009 - Clinically Observed Chickenpox and the Risk of Childhood-onset Multiple Sclerosis - journal article (American Journal of Epidemiology) - "The authors concluded that clinically observed chickenpox was associated with a lower risk of childhood-onset MS in a French  population."

Measles
Positive effect of measles citations
Homeopathy and measles
Naturopathy

"After contracting measles and other childhood illnesses (e.g.. chickenpox, scarlet fever, whooping cough, rubella, mumps and may be others), it has been widely accepted by many health practitioners, including experienced orthodox paediatricians that this is often beneficial for the general health of many children. Specifically it has been shown that children contracting measles naturally were less likely to suffer from allergic conditions such as asthma, eczema and hayfever, (Lancer June 29 1996)."---Trevor Gunn BSc