To date, four types of HTLVs (human T-lymphotropic virus 1 [HTLV-I], human T-lymphotropic virus 2 [HTLV-II], HTLV-III, and HTLV-IV) and four types of STLVs (STLV-I, STLV-II, STLV-III, and STLV-V) have been identified. HTLV types HTLV-1 and HTLV-2 viruses are the first retroviruses which were discovered. Both belong to the oncovirus subfamily of retroviruses and can transform human lymphocytes so that they are self-sustaining in vitro.
The goal keeper must wear a jersey distinguishable from his team and the opposing team. This is almost always interpreted to mean he must wear a different color.he goal keeper must wear a jersey distinguishable from his team and the opposing team. This is almost always interpreted to mean he must wear a different color.
A goalkeeper may handle the ball within his own penalty area (a rectangle marked by the goal line extending 18 yards beyond his goal posts, two 18-yard lines perpendicular to the delineated part of the goal line, and a line connecting the ends of those two lines and parallel to the goal line,... holding the ball for more than six seconds, when the goalkeeper has left his feet to make a save, or when the keeper's control of the ball is by holding it on the ground with a hand on top, or.