Vaccine interchangeability fine but govt must draft policy: Virologist

While science permits interchangeability of Covid-19 shots, the government must draft a policy on it, says Dr T Jacob John, retired professor and head of clinical virology and microbiology, Christian Medical College, Vellore. In an interview with TOI, the top virologist says, he has doubts whether the government really believes in vaccines at all, given hindrances faced by vaccine seekers. Excerpts