So when these in - clinic tests are performed properly, it means that a positive test result demonstrates the dog or cat does have protective levels of antibody against the virus. (dogsnaturallymagazine.com)
That suggests that obese individuals may be at risk for flu infections even if their blood antibodies reach what have been considered protective levels, she said. (sciencedaily.com)
This increases the likelihood of long - term protection from vaccination as soon as maternal antibody levels have declined below protective levels. (tampabayvets.net)