Why are safer vaccines being produced?

The ‘antigen’ containing material given to acquire either permanent or temporary immunity against a specific pathogen or disease is known as Vaccine. Vaccines are traditionally manufactured using pathogens. Completely or partially killed pathogens are being used as vaccines. But, as a result, there was the possibility of some people contracting the disease. As an alternative, scientists tried to artificially make vaccines via biotechnology. To do so, scientists have manufactured the antigen in the laboratory with the help of the gene isolated from the pathogen, used as a vaccine. Hence, safer vaccines are being produced.