Asserting that the strategy of starting the vaccination programme with frontline warriors has paid rich dividends in the second wave of COVID-19, Prime Minister Narendra Modi said on Monday that the vaccines have ensured the safety of most of the doctors as 90 percent of health professionals have already taken its first dose. In an interaction with a group of doctors via video-conferencing, Modi said be it testing, supply of medicines or setting up new infrastructure in "record time", all these are being done at a fast pace, according to a statement. His assertions came amid criticism from opposition parties of his government's vaccination programme and also alleged poor handling of the second wave of the pandemic.