FILE- A health worker screens people for COVID-19 symptoms at Dharavi, one of Asia's biggest slums, in Mumbai, India, Monday, July 6, 2020. India on Tuesday, Sept. 6, 2022, cleared a new approach to COVID-19 vaccination, a nasal version designed to fight the virus right where it enters the body. It may be easier to administer a squirt in the nose than a shot, especially in low-income countries, said Dr. Michael Diamond of Washington University in St. Louis, who helped create the vaccine licensed to Bharat. (AP Photo/Rafiq Maqbool, File)