Why doesnt someone make a vaccine that isnt made of a base of livers taken from deliberately infected rabbits?
Related Questions
- When children less than 24 months of age are infected with Hib, why does the infection not confer immunity but the vaccine does?
- Why doesnt someone make a vaccine that isnt made of a base of livers taken from deliberately infected rabbits?
- Is receiving contaminated vaccine the only way to become infected with SV40?