PTI, virologists Shahid Jameel and T Jacob John are certain that not following Covid-19 safety protocol and a sluggish vaccination drive could be to blame.Jameel said that the interplay of mutants and vaccines over the next couple of months will decide the future of Covid in India and the world.“The intensity of the surge also suggests that there were a huge number of susceptible people after the first wave," said Jameel, who is the director of the Trivedi School of Biosciences at Ashoka University.The fact that people lowered the guard and didn’t follow Covid protocols after the first wave was over is “certainly one valid explanation" for the surge, he said.The Centre has warned that the next four weeks are critical and people’s.