Can we attain #HerdImmunity against #Covid-19 by lifting the #lockdown?

For herd immunity, 2/3 populations needs to attain immunity against #CoronaVirus either by vaccination or by infection . #Vaccine is unavailable so 65 percent people need to be exposed to virus to save the rest which is a dangerous preposition:
Dr Shivkumar Utture, Maharashtra Medical Council President, Dr Kamaxi Bhate of KEM Medical College Mumbai & Dr Able Lawrence from SGPGI Lucknow in conversation with Journalist Kanchan Srivastava @Ms_Aflatoon