HealthChinaFirst countries approve nasal vaccinesTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoHealthChinaDerrick Wiliams09/22/2022September 22, 2022Could a nasal vaccine help protect more students, teachers and others from the next coronavirus wave? China, India and Iran just approved it. But how do nasal vaccines work?https://p.dw.com/p/4HEGhAdvertisement