Samajwadi Party President Akhilesh Yadav Saturday termed the Covid-19 vaccines to be rolled out in the country as "vaccine of the BJP" and said he would not take the shot, drawing a sharp retort from the ruling party which accused him of "insulting" the doctors and scientists. "How can I trust the vaccine, which will be used for vaccination by the BJP? We cannot get vaccinated by the BJP's vaccine," he told reporters here.