Accumulating infections of highly pathogenic H5N1 avian influenza in humans underlines the need to track the ability of these viruses to spread among humans. A human-transmissible avian influenza virus is expected to cause clusters of infections in humans living in close contact. Therefore. epidemiological analysis of infection clusters in human households is of key importance. https://www.footballmediaservices.com/product-category/tig-torch-alumina-cup/