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The Department of Science reveals the results of surveillance of influenza strains, finding the highest strain A at 41.14%, confirming that the vaccine is still effective in protection. Advise people in at-risk groups to get vaccinated.
Dr. Yongyot Thamwut, Director-General of the Department of Medical Sciences Revealing the situation of the influenza virus Between 1 October 2023-present Around the world, influenza A(H3N2), influenza A(H1N1)pdm09, and influenza B (Victoria lineage) have been found to be the causes of seasonal influenza outbreaks.
As for the outbreak situation in Thailand Currently, influenza type A(H3N2) is found the most, accounting for 41.14%, followed by influenza type B (Victoria) at 39.64%, while influenza type A/H1N1 (pdm09) has a proportion of 19.22%.
When analyzing strains of the influenza virus in Thailand (1 October 2023 – April 2024) using the Whole genome sequencing technique, analyzing the genetic sequence of the entire genome. and assess compliance with the vaccine strain. World Health Organization It has been announced for use in the production of vaccines in the northern and southern hemispheres for the year 2024. It was found that strains A(H3N2) and B are similar to vaccine strains from both the northern and southern hemispheres. For vaccines used via The northern hemisphere will produce and sell it on the world market. Around August and will be imported into Thailand around September.
Dr. Yongyot Thammawutthi
Therefore, people who need to get vaccinated against influenza, which is recommended before the rainy season. Therefore, vaccines must be used in the southern hemisphere, which are produced and sold on the world market first. This also has an effect on protecting against two strains of influenza found in Thailand: A(H3N2) and influenza B. As for A(H1N1), there may be some cross-species immunity.
Dr. Yongyot further said that from the analysis of the mutation location on the gene. Of the influenza viruses found in Thailand during October 2023-April 2024, a total of 1,332 samples, based on drug resistance gene location information from the World Health Organization on May 3, 2023, no genes indicating drug resistance were found for influenza A/H3 and B viruses.
As for influenza A(H1N1) pdm09, genes indicating resistance to oseltamivir were found at position H275Y for 1 strain, accounting for a resistance rate of 0.39%. No genes indicating resistance to this group of drugs were found. Other types of Neuraminidase Inhibitor
However, the Department of Medical Sciences Continue to monitor and follow changes in influenza strains. Rapid detection of drug resistance genes It will be helpful for doctors to plan the appropriate use of antiretroviral drugs. as well as put in place appropriate and timely measures to control and prevent disease.
At the same time, people in at-risk groups such as the elderly and people with chronic diseases are asked to Get vaccinated against influenza every year. Along with protecting yourself by washing your hands often. Do not get into close contact with patients who have flu symptoms and avoid being in crowded and poorly ventilated places. For an unnecessarily long time, if you suspect you are sick, it is recommended to wear a mask every time.
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