2025 United Kingdom data indicated seasonal influenza vaccines were approximately 70%â75% protective against hospitalization in children and approximately 30%â40% protective against hospitalization in adults.
November 19, 2025
high
statistical
Early-season vaccine effectiveness estimates reported from UK surveillance
Immunity from an influenza vaccine typically begins about two weeks after vaccination.
November 19, 2025
high
medical
Time to develop protective immunity following influenza vaccination
For almost a century, aluminum salts have been used as adjuvants in some vaccines, including vaccines that protect against diphtheria, tetanus, hepatitis, and influenza.
October 31, 2025
high
general
Aluminum salts historically serve as adjuvants in multiple routine vaccines.
A 2019â2023 retrospective analysis of medical records from more than 1,000 patients treated for advanced skin and lung cancer at MD Anderson Cancer Center found that patients who received a COVID-19 mRNA vaccine within 100 days of starting checkpoint inhibitor immunotherapy had significantly longer overall survival; for patients with advanced lung cancer, median survival was 37.3 months for vaccinated patients versus 20.6 months for unvaccinated patients.
December 31, 2023
high
temporal
Retrospective medical-record analysis covering patient treatments from 2019 through 2023 at MD Anderson Cancer Center; comparison between patients who did and did not receive a COVID-19 mRNA vaccine within 100 days of starting checkpoint inhibitor therapy.