Liability protection to vaccine makers should be prospective not retrospective Fri, Jun 4 2021 10:48 IST | 0 Views China to produce over 3 billion Covid vax this year. Image Source: IANS News Chennai, June 4 : Even though providing protection against liability claims to the vaccine manufacturers as contemplated by the central government seems unconstitutional, if at all it is given then it should be prospective and not retrospective, said an advocate whose client has preferred a claim against Serum Institute of India Private Ltd. The Cenre is mulling to provide protection from indemnity protection to Pfizer and Moderna in case of adverse effects on people administered with their Covid-19 vaccine.