FDA: More than half of sampled alcohol-based hand sanitizers from Mexico found to be poisonous By Kelly Hayes New COVID-19 strain could increase chances for reinfection Researchers analyzing preliminary data of recently discovered COVID-19 mutations in South Africa and Brazil say the new variants exhibit a higher possibility of reinfection as well as evasion of immune responses. WASHINGTON - The U.S. Food and Drug Administration issued an "import alert" on all alcohol-based hand sanitizers from Mexico after the agency found that 84% of sampled products were not in compliance with safety regulations — and more than half were found to contain poisonous ingredients. Several deaths have been tied to some of the products.