India produces much of the world's vaccines in normal times, and even produced enough COVID-19 vaccines that it was donating doses to poorer countries earlier this year. So how did a vaccine powerhouse with an existing distribution infrastructure end up with one of the world's worst COVID crises? Dr. Anita Shet of the Johns Hopkins International Vaccine Access Center talks with Stephanie Desmon about India's vaccine situation, what the crisis could mean for the supply of other critical vaccines, and what needs to be done to stem the outbreak.