Here’s why masking and other safety measures could return if an avian flu pandemic is declared. A continuous flare-up of bird influenza among U.S. dairy cows has prompted three affirmed human cases among dairy laborers, and keeping in mind that there have been no affirmed instances of human-to-human transmission, specialists caution that wellbeing estimates like veils, immunizations and goggles will. be important on the off chance that a pandemic is pronounced because of the dangerous idea of the infection.