In the 1900s, nearly 300 million people died from the smallpox disease. By 1980, after millions of people received the smallpox vaccine, smallpox had disappeared from the world. Find out more in Vaccines, a title in the Debating the Issues series.

Revison of: The debate about vaccines. 2018. Includes index.

Understanding vaccines -- Pro: vaccines prevent deadly diseases -- Pro: vaccines are safe and cost-effective -- Pro: vaccines protect the unvaccinated -- Con: vaccines do not always work -- Con: not everyone should be vaccinated -- Con: vaccines can cause side effects -- Pros and cons summary -- Focus on vaccines.