Yellow fever (YF):
- Hypersensitivity reactions
- Very rare
- Sensitivity to egg, which is commonly used to stabilize the vaccine, may explain at least some of these cases
2. Vaccine-associated neurotropic disease (encephalitis)
- Very rare
- Infants seem more susceptible to vaccine-associated neurotropic disease than the YF-vaccinated population at large
3. Vaccine-associated viscerotropic disease
- Very rare in children at 0.00001%
- The elderly seem more susceptible to reactions (very rare at 0.04-0.05%) than the YF-vaccinated population at large