The 5 overall health care workers were definitively seronegative towards H5 in all assays, which means they weren't contaminated with H5. For that analyze, scientists collected brain samples from four sea lions, just one fur seal as well as a tern found useless at the most impacted sea lion rookery https://www.dailypioneer.com/2019/india/mathematician-vashishtha-narayan-singh-dies--pmch-denies-ambulance-to-family.html