Why some vaccine side effects may be avoidable without weakening protection

MedicalXpress | 四月 13, 2026

Vaccines play a critical role in preventing infectious diseases, but their success often depends on adjuvants—substances that enhance immune responses. While these compounds improve vaccine effectiveness, they can also trigger reactogenicity, such as local swelling or fever. For decades, scientists have assumed that these beneficial and adverse effects are closely linked, making it difficult to improve one without affecting the other.