<P> In the spring of 1793 , French colonial refugees , some with slaves , arrived from Cap Français , Saint - Domingue . The 2,000 immigrants were fleeing the slave revolution in the north of the island . They crowded the port of Philadelphia , where the first yellow fever epidemic in 30 years began in the city in August . It is likely that the refugees and ships carried the yellow fever virus and mosquitoes . It is transmitted during mosquito bites . The mosquitoes easily breed in small amounts of standing water . The medical community and others in 1793 did not understand the role of mosquitoes in the transmission of yellow fever and other diseases . Physicians and other survivors of the epidemic wrote extensively about it trying to learn from the crisis . </P>
<P> In the spring of 1793 , French colonial refugees , some with slaves , arrived from Cap Français , Saint - Domingue . The 2,000 immigrants were fleeing the slave revolution in the north of the island . They crowded the port of Philadelphia , where the first yellow fever epidemic in 30 years began in the city in August . It is likely that the refugees and ships carried the yellow fever virus and mosquitoes . It is transmitted during mosquito bites . The mosquitoes easily breed in small amounts of standing water . The medical community and others in 1793 did not understand the role of mosquitoes in the transmission of yellow fever and other diseases . Physicians and other survivors of the epidemic wrote extensively about it trying to learn from the crisis . </P>
when did the yellow fever epidemic of 1793 start
when did the yellow fever epidemic of 1793 start
spring of 1793
spring of 1793