Vp. Sharma et al., MOSQUITO REPELLENT ACTION OF NEEM (AZADIRACHTA-INDICA) OIL, Journal of the American Mosquito Control Association, 9(3), 1993, pp. 359-360
Two percent neem oil mixed in coconut oil, when applied to the exposed
body parts of human volunteers, provided complete protection for 12 h
from the bites of all anopheline species. Application of neem oil is
safe and can be used for protection from malaria in endemic countries.