So is fasting :) Some researches that I've heard of suggest that after the initial significant drop in a total number of lymphocytes, about 2 weeks after the bl

So is fasting :) Some researches that I've heard of suggest that after the initial significant drop in a total number of lymphocytes, about 2 weeks after the blood donation body will restore the previous immunological status. This is obviously done by generating new leukocytes, which is similar to the effect of fasting: when you start eating normal after the fasting period body will regenerate it's blood cells. The suggested gain here is not "a boost" of immune system, but getting rid of damaged, mutated cells.