Can it be useful? How?
PCR can detect the virus in virtually any material but, does it mean the sample contains the virus and it is infectious? Is any PCR test valid for any strain?
Influenza researchers are trying to stimulate antibody responses towards parts of the HA that are the least variable from strain to strain. One approach that seems promising is choosing two antigenically very different strains within the H1 or H3 subtype for the primary and subsequent booster vaccinations.
Producing well with a low antimicrobial usage: Is it possible in high pig-density areas? And, what is the role of the age at weaning?