Immunity to the hepatitis B virus is thought to be lifelong. The hepatitis A vaccine is effective for at least 25 years in adults and 14 years in children.n clinical trials, 1 month after the last dose, 100% of people were immune to hepatitis A, while 99.7% were immune to hepatitis B. But in practice, immunity may not approach these levels. Hepatitis B vaccine usually does not provide immunity for more than 95% to 97% of people.
Deer antler spray and pills are known to contain small amounts of deer IGF-1 (Insulin-like Growth Factor-1), which is what the liver converts HGH into, resulting in artificially enhanced muscle regeneration and growth that has made NFL ban the use of HGH and deer antler spray.
Each part of elk velvet contains varying compounds, but the deer antler velvet contains the largest concentrations of those found to be beneficial. (Antler also has been sold by the slice). Heating during processing may reduce or destroy the purported beneficial effects of velvet antler.