biting time varies between species, so travellers should assume they are at risk of being bitten from dusk to dawn inclusive
biting of several major malaria vectors in Africa peaks at and just after midnight so protection in bed is especially important
however, in many parts of South America and South East Asia, the greatest risk from being bitten by malaria vectors is in the evening, before the population retires indoors
note though - as other species of mosquito for example those which transmit yellow fever, dengue fever and other arboviral infections, bite during the daytime, it is important to maintain bite precautions during daylight hours
Reference:
Public Health England. Guidelines for malaria prevention in travellers from the UK 2019
Add information to this page that would be handy to have on hand during a consultation, such as a web address or phone number. This information will always be displayed when you visit this page