The recent spike in Covid cases is not a new wave, and is part of the third wave caused by the Omicron variant of the virus, the government's top expert on the viral infection said, stressing that there's no need to worry about the situation, but the Centre will keep monitoring the situation. Cases and positivity rate are not important, what's crucial is that hospital admissions have not increased, he said. "Infections recorded recently are mild, and the patients heal in four to five days. The chances of serious illness are low," Dr NK Arora, Chairman of India's COVID-19 Working Group of the National Technical Advisory Group on Immunisation (NTAGI), told NDTV.