Nasal sprays, oral vaccines, and other new types of COVID-19 vaccines may be ready soon, according to Dr. Soumya Swaminathan, Chief Scientist at the World Health Organization. She previews some of these needle-less vaccines and notes that the possibility of being able to store vaccines at room temperature could be a game-changer for vaccinating poorer nations. The advantage of nasal sprays, she explains, is that they "would generate local mucosal immunity in addition to systemic immunity." Dr. Swaminathan's conversation with Ian Bremmer is featured on the latest episode of GZERO World, airing on US public television stations starting this Friday, April 9. Check local listings.