The Department of Science releases the results of the surveillance of influenza strains, finding the highest A strain at 41.14%, confirming that the vaccine is still effective in protection. Advise people belonging to risk groups to get vaccinated.
Dr. Yongyot Thamwut, Director General of the Department of Medical Sciences Influenza Virus Situation Revealed Between October 1, 2023-present Worldwide, influenza A(H3N2), influenza A(H1N1) pdm09 has been discovered and influenza B (Victoria lineage) are the causes of seasonal influenza epidemics.
Regarding the epidemic situation in Thailand. Currently, type A influenza (H3N2) is the most frequently encountered, with 41.14%, followed by type B influenza (Victoria) with 39.64%. while influenza type A/H1N1 (pdm09) has a percentage of 19.22%.
During the analysis of influenza virus strains in Thailand (October 1, 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 vaccine production in the Northern and Southern Hemispheres for the year 2024. The A (H3N2) and B strains have been found to be similar to the Northern and Southern Hemisphere vaccine strains for vaccines used via The Northern Hemisphere will produce it and sell it on the world market. Around August and will be imported to Thailand around September
Doctor Yongyot Thamwutthi
Therefore, people who need to get vaccinated against influenza, which is recommended before the rainy season. Therefore, vaccines, which are first produced and sold on the world market, must be used in the southern hemisphere. This also has an effect on protection against two strains of influenza found in Thailand: A (H3N2) and influenza B. As for A (H1N1), there may be some immunity between species.
Dr. Yongyot further stated this from the analysis of the location of the mutation on the gene. Of the influenza viruses detected in Thailand during the period October 2023-April 2024, out of a total of 1,332 samples, based on information on the location of drug resistance genes provided by the World Health Organization on May 3, 2023, no gene indicating drug resistance to influenza A/H3 and virus B.
Regarding influenza A(H1N1) pdm09, genes indicating resistance to oseltamivir were found at position H275Y for 1 strain, representing a resistance rate of 0.39%. No genes were found that indicated resistance to this group of drugs. Other types of neuraminidase inhibitors
However, the Department of Medical Sciences continues to monitor and track changes in influenza strains. Rapid identification of drug resistance genes It will be helpful for doctors to plan the appropriate use of antiretroviral drugs. as well as implement adequate and timely measures to control and prevent diseases.
At the same time, people from risk groups such as the elderly and people with chronic diseases are asked to get vaccinated against influenza every year. As well as protecting yourself by washing your hands often. Do not come into close contact with patients showing flu symptoms and avoid staying in crowded and poorly ventilated places. For an unnecessarily long time, if you suspect that you are sick, it is recommended to wear a mask every time.
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