The Covid-19 third wave peak in India is expected to arrive at the end of this month with daily cases of four to eight lakh (seven-day average) and the peak in Delhi and Mumbai are expected around mid-January with daily cases of 50,000-60,000 and 30,000 odd cases (seven-day average), respectively, said IIT Kanpur professor Manindra Agrawal, who is leading the government's backed Sutra model to mathematically predict the spread of the virus, on Sunday.The Covid-19 third wave peak in India is expected to arrive at the end of this month with daily cases of four to eight lakh (seven-day average) and the peak in Delhi and Mumbai are expected around mid-January with daily cases of 50,000-60,000 and 30,000 odd cases (seven-day average), respectively, said IIT Kanpur professor Manindra Agrawal, who is leading the government's backed Sutra model to mathematically predict the spread of the virus, on Sunday.