India has recently surpassed Brazil as the country with the second-highest number of confirmed Covid-19 cases. With a staggering 200,000 plus cases reported yesterday, the virus is sparing no one – whether young or old, vaccinated or not vaccinated. So, will the arrival of imported vaccines change anything? Going by the history of pandemics, once they emerge, they rarely leave. With the exception of smallpox – the only human disease eradicated with vaccination – virtually every disease pathogen is still with us albeit now as an endemic. Take for instance, the deadly Plague of 14th century caused by the bacterium Yersinia pestis. Countless local outbreaks still surface and constantly remind us of the persistent nature of pathogens.