8\ 1 point\ What is one of the earliest historical examples of using vaccinations?\ Inoculating patients with cowpox to protect against smallpox.\ Inoculating patients with smallpox to protect against cowpox.\ The polio vaccine developed by Edward Jenner.\ Having chickenpox parties to expose children to the disease when they are healthy.

Vhat is one of the earliest historical examples of using vaccinations? Inoculating patients with cowpox to protect against smallpox. Inoculating patients with smallpox to protect against cowpox. The polio vaccine developed by Edward Jenner. Having chickenpox parties to expose children to the disease when they are healthy