How do you get low testosterone

But it’s a study way back in 1999 that actually offers a possible explanation for these counterintuitive findings: “the  antigenic distance  hypothesis.” That is, the more different a particular vaccine’s strains are from the previous year, the more effective the vaccine is likely to be (assuming the vaccine strains match the circulating strains that year). But vaccine strains that are more similar to the previous year’s vaccine strains — such as last year’s H3N2 A strain, identical to the strain in the 2013-2014 season’s vaccine — may end up less effective, and we did see very low effectiveness last year because of the H3N2 strain.

How do you get low testosterone

how do you get low testosterone

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