Thalassemia gives protection against:
Filaria
Kala-azar
Malaria
Leptospirosis
c. Malaria(Ref: Nelson's 20/e p 2349', Ghai 8/e p 341)Thalassemia gives a reduced parasite invasion/growth and an increased susceptibility to phagocytosis of the infected RBC as a malaria-protective effect.
C.V.S.