Leg pain is also frequently a sign of injury, such as the following: Muscle strain is a common injury that happens when the muscle fibers tear as a result of overstretching. It often occurs in the larger muscles, such as the hamstrings, calves, or quadriceps.
medical Definition of superinfection : a second infection superimposed on an earlier one especially by a different microbial agent of exogenous or endogenous origin that is resistant to the treatment used against the first infection
Background â trifecta. Trifecta is a late 20th century term originating from horse racing. The noun triple is a common lexical variant. The word trifecta is formed from a blend of the morpheme tri- ('three') and the noun perfecta. Perfecta is based on the Latin American phrase quiniela perfecta, used to describe a bet in which first and second place winners are picked in the right order.