It is not true that flu shots caused the deaths of nine people in South Korea.
flu shot myths
The flu shot does not contain hidden COVID strains.
The efficacy rate of the flu vaccine was much higher than 9% last year.
Although the effectiveness of the flu vaccine varies from year to year, depending on how well matched the vaccine is to circulating flu virus strains, which strains are dominant, and whether they have drifted, it is always a good idea to get vaccinated and protected.