Jiangsu Province Centers For Disease Control And Prevention

This large trial will study whether flu and pneumonia vaccines can reduce serious flare-ups and medical costs in people aged 45-80 with COPD. About 7,000 participants will be split into four groups: flu vaccine, pneumonia vaccine, both, or no vaccine. Researchers will track lung …

This study will test if giving a 9-valent HPV vaccine to women who previously received the bivalent HPV vaccine is safe and boosts their immune response. Researchers will enroll 360 healthy women aged 18-45 and compare two different dosing schedules (two doses vs. three doses) ag…