CDC conducts studies each year to determine how well the flu vaccine protects against flu illness. <span>While vaccine effectiveness can vary,</span> recent studies show vaccine reduces the risk of flu illness by about 50% to 60% among the overall population during seasons when most circulating flu viruses are like the vaccine viruses.
It originated from ancient China.
Incorrect posture and body movement can cause strains to <u>m</u><u>u</u><u>s</u><u>c</u><u>l</u><u>e</u><u>s</u> or joints.
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