Are Covid waves common, and would India need a booster dose again?

India has witnessed a surge in Covid infections over the last week, with over 6,000 people infected and 32 deaths. Though over 90 percent of the population is vaccinated with a second dose, are we still susceptible to Covid? Does lower precautionary dose coverage open India to more trouble and is Covid going to be a regular phenomenon in our lives? More importantly, do we need a fourth dose to stave off new viruses? Tune in for answers to these questions and more.