Influenza A / H1N1: Only 1 dose of vaccine is needed

A dose of H1N1 vaccine is also enough to protect adults from the flu virus spreading throughout the world.

Researchers in Australia say they are testing the H1N1 vaccine for 240 volunteers (aged 18-64). Half of them use a 15-microgram dose while the other 30 micrograms. After 21 days, blood tests showed that most volunteers had an immune response of 1 to 40 degrees of standard.

' Having an immune response between 1 and 40 degrees is one of the criteria for the US Food and Drug Administration to recognize flu vaccines ,' according to Dr. Raymond Strikas, Flower Vaccine Program. Ky said.

Information was published in the New England Journal of Medicine.

The researchers say the 15milligram vaccine will work on average, similar to the seasonal flu vaccine. Experts are now looking at how a single dose of vaccine will give optimal efficacy across the board.

Scientists at the National Institutes of Health (NIH) are also testing H1N1 vaccines in other places. Dr. Anthony Fauci, Director of the Institute of Allergy and Infectious Diseases, according to NIH, said: ' NIH studies show that only 1 dose of vaccine is needed to support the immune system in healthy adults. '.

Fauci said their results showed that a strong immune response by the vaccine appeared after 8-10 days of a 15 microgram dose, but he also said that this was not really impressive.

' The immune system needs to be strengthened as quickly as possible in the current situation, ' said Dr. William Schaffner, chairman of the Department of Preventive Medicine, Vanderbilt University and the US Centers for Disease Control and Prevention. explain.