Philadelphia yellow fever epidemic: 1793

At the point when yellow fever held onto Philadelphia, the United States' capital at that point, authorities wrongly accepted that slaves were insusceptible. Therefore, abolitionists called for individuals of African starting point to be selected to nurture the debilitated.

The ailment is conveyed and transmitted by mosquitoes, which encountered a populace blast during the especially sweltering and damp summer climate in Philadelphia that year. It wasn't until winter shown up — and the mosquitoes vanished — that the scourge at long last halted. By at that point, in excess of 5,000 individuals had kicked the bucket.