Back in 1991, injection site lesions occurred in 22.3% of carcasses. In 2011, injection sites lesions in fed cattle are less than 0.00001%, which is pretty darn close to zero.
However, improvement and education is still needed, especially in the dairy industry, where 41% of dairy producers still give injections in the animal’s rump. Beef cull cows and bulls also have higher rates of injection site lesions.
Subcutaneous (Sub-Q) injections, giving less than 10 cc’s per injection, and giving injections in the “triangle” on the neck helps minimize injection sites in the carcass.
Source: University of Nebraska