All Covid-19 vaccines do not prevent infection and are primarily disease-modifying, said Dr Balram Bhargava, Director General, Indian Council of Medical Research (ICMR).

Briefing media persons, DG, ICMR said, "All Covid-19 vaccines, whether they are from India, Israel, US, Europe, UK or China, are primarily disease-modifying. They do not prevent infection. The precautionary dose is primarily to mitigate the severity of infection, hospitalisation and death."