About the discussion on our different type of vaccines.
My elderly sister is suffering from a special heart disease and each year before the flu season starts she get a shot of that years influenza vaccine.
Almost every year she gets infected by the flu, but she does not get very ill, like having high fever or pain all over the body. It's like she does not notice it(have been infected)
One year the influenza mutated and the vaccine she got became obsolete she was very sick that year.
Markus
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My little lovely female cat
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