Question

how did the Indians manage to save their children from a major attack of smallpox?​

Answer 1

Answer:

A prevention at that time was using small pox virus itself was a vaccine available

Even though many people at that time was attacked by small pox virus milk vendors were not effected by small pox...

A scientist at that time realised this thing and started this small pox virus itself as a vaccine but in small amounts only.. because small amounts causes primary response and it's successive response which is called secondary immune response which causes release many antibodies...

hope this helps u