Malaria was once common in most of Europe and North America, where it is now for all purposes non-existent.[103] Malaria may have contributed to the decline of the Roman Empire.[104] The disease became known as "Roman fever."[105] Plasmodium falciparum became a real threat to colonists and indigenous people alike when it was introduced into the Americas along with the slave trade.
Vhulwadze ha dali ho vha hu vhulwadze ho doweleaho Europe na North America, lune zwino a u tsha wanalea.[16] Vhulwadze vha dali u ngavha wo dzhenisa tshanda kha u wisa Roman Empire.[17] Vhulwadze uvhu vho swika hune ha divhea sa "duda la Rome."[18] Plasmodium falciparum wo vha khombo kha vha kholonisi na vhathu vha kale u fana na musi u tshi divhazwa America khathihi na u renga dziphuli.