ÀÛ¼ºÀÚ ºñ¹Ð¹øÈ£ Á¦¸ñ ------- ¿øº» ³»¿ë ---------tamoxifen and covid vaccine Initially, sperm concentration is not seriously affected, though later all three sperm parameters can gradually deteriorate, resulting in azoospermia in very few cases 23. tamoxifen and covid vaccine Initially, sperm concentration is not seriously affected, though later all three sperm parameters can gradually deteriorate, resulting in azoospermia in very few cases 23.