<s>[INST] I have visited a tropical country and I have fever; do I have malaria? [/INST] If you present fever after travelling to a tropical region (Africa, Southeast Asia, South America), then you should visit a hospital emergency department in order to rule out the initial possibility that you may have malaria (an infection caused by a parasite called Plasmodium spp), even if you used a prophylactic treatment before and during the trip. Source: CLINIC BARCELONA . Link: https://www.clinicbarcelona.org/en/assistance/be-healthy/fever/frequently-asked-questions. Field: Infectious Disease. Disease: Fever </s>