Question

Now a days, safer vaccines are being produced. give scientific reason​

Answer 1

Answer:

This is because technology has improved and knowledge about diseases has expanded. It has become for biologists to predict the causes of diseases nowadays.

Hope this helps!

Answer 2

Answer:

Read more about vaccines on the Official Vaccines page from the World Health Organization. Info on Initiatives, Diseases, Impact and Common FAQs on Vaccines and Immunization. In multiple languages. Situation updates. Latest WHO conferences.

Explanation: