Two environmental samples taken from Hong Kong’s Mai Po nature reserve have tested positive for the “highly pathogenic” H5 avian flu virus, the Agriculture, Fisheries and Conservation Department (AFCD) revealed on Friday. A department spokesman said that a research team from the University of Hong Kong’s School of Public Health had confirmed the positive tests on samples collected on Wednesday as part of regular surveillance. “AFCD is closely monitoring the situation of the birds in the Mai Po...