New Delhi, Dec. 3 -- In view of the threat from a new Covid-19 variant, Omicron, opposition parties on Thursday sought to know from the Centre about the roadmap for vaccination and clarity on booster dose, even as the government hailed Prime Minister Narendra Modi's steps to combat the pandemic.

In a discussion in the Lok Sabha on the Covid pandemic, opposition members flagged views on booster doses of vaccines for the elderly and those with co-morbidities and demanded that the government spell out its policy on the issue.

"What is the situation on booster doses, we want to know. The vaccination coverage should be scaled up further. If we could vaccinate 2.5 crore people on a single day on one occasion, why hasn't it picked up to that l...