because viruses responsible for viral fever are many and mutate very rapidly.
yellow fever
Yellow fever
While vaccines are mostly viral, the bacteria causing typhoid fever is also used as a vaccine.
A vaccine that provides immunity to yellow fever was developed in 1939. Vaccination is required for all persons traveling to regions where yellow fever is known to exist.
Protection is offered by Q-Vax, a whole-cell, inactivated vaccine developed by an Australian vaccine manufacturing company, CSL. The company has developed a large number of vaccines.
There is currently no vaccine available against Hepatitis C. There is research going on to develop one but it will take years at least before one is developed.
Jonas Salk developed the polio vaccine, known as the inactivated polio vaccine (IPV). The vaccine was used to prevent poliomyelitis, a highly infectious viral disease that can cause paralysis and, in severe cases, death.
No. There is no vaccine for Hepatitis C, HIV, or Viral Hemorrhagic Fever (VHF).
When the vaccine gets to the body the it will block away the viral infection.
yellow fever vaccine
The vaccine for scarlet fever was developed by Dr. Thomas Francis Jr. and his colleagues in the 1930s. While the disease itself is caused by the bacterium Streptococcus pyogenes, the vaccine was based on the discovery of a specific toxin produced by the bacteria. However, the vaccine was never widely adopted or used, as the incidence of scarlet fever declined significantly with improved hygiene and antibiotic treatments.
As of 1998, there is no vaccine that is effective against parrot fever.