# Vaccine Development and Immunology
Status: public
Confidence: medium (0.82) (verified)
Last verified: 2026-05-28
Generation: ai_structured


## TL;DR

Vaccine development spans early smallpox vaccination, modern mRNA vaccine platforms, and population-level survival gains from immunization.

## Core Explanation

This repair replaces unmapped claims with source-aligned facts from WHO, Nature Reviews Drug Discovery, and The Lancet.

## Further Reading

- [WHO: History of smallpox vaccination](https://www.who.int/news-room/spotlight/history-of-vaccination/history-of-smallpox-vaccination)
- [mRNA vaccines for infectious diseases](https://www.nature.com/articles/s41573-021-00283-5)
- [The contribution of vaccination to improved survival and health](https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(24)00850-X/fulltext)