Does a smallpox drug weaken the vaccine? new study aims to find out.
Knowledge-focused
Ongoing
This study looks at whether taking the smallpox drug TPOXX changes how well the JYNNEOS vaccine works. About 100 healthy adults aged 18 to 42 will get two doses of the vaccine and either TPOXX or a placebo for 28 days. Researchers will check for side effects and measure immune re…
Phase: PHASE2 • Sponsor: SIGA Technologies • Aim: Knowledge-focused
Last updated Jun 27, 2026 12:03 UTC