What is the Yellow Fever Vaccine?
The Yellow Fever vaccine (specifically the 17D strain) is a live-attenuated vaccine. This means it contains a weakened version of the virus that cannot cause the disease in healthy people but “trains” the immune system to recognize and fight it.
The Science: It induces a robust T-cell response and neutralizing antibodies.
Effectiveness: Over 99% of people develop lifelong immunity within 30 days of a single dose.