Congress general secretary and chief spokesperson Randeep Surjewala accused the BJP of pushing India into a dark age of religious polarisation to "subserve its parochial political agenda in the short term".
Dreze and Gupta were taken into preventive custody for organising a programme without taking permission.
Several private hospitals across the country said they have no clarity on procuring COVID-19 vaccines under the new policy announced by Prime Minister Narendra Modi and that it has led to the vaccination being put on hold at their centres.