Leukaemia

Measles

Childhood infectious diseases and risks of leukaemia in an adult population. 2013, Parodi, Int J Cancer

Measles is associated with a reduced risk of chronic lymphocytic leukemia by 47%. The more childhood diseases (mumps, chickenpox, whooping cough, etc.), the lower the risk of lymphocytic leukemia. One-two children's illnesses reduced it by 16%, and three and more diseases - by 53%.

Measles

Childhood leukemia and infectious diseases in the first year of life: a register-based case-control study. 1986, van Steensel-Moll, Am J Epidemiol

Colds, temperature and childhood infections are associated with a decrease in the risk of leukemia.
Even more similar studies:

[1] 2008, Urayama, Radiat Prot Dosimetry
[2] 2008, Ribeiro, Int J Cancer

Whooping cough

Childhood infectious diseases and risks of leukaemia in an adult population. 2013, Parodi, Int J Cancer

Children who had whooping cough during childhood, had a 1.5-2 times lower risk of developing some types of leukemia.