Researchers published early trial results for a microneedle patch that delivers vaccines through the skin. The approach could make distribution easier, particularly in settings where cold storage and trained staff are limited.

Participants reported mild and short-lived skin irritation, with immune responses comparable to traditional injection methods. Scientists said larger trials are needed to confirm efficacy across different populations.

If validated, patch-based delivery could reduce waste and simplify mass vaccination campaigns, especially during outbreaks that require rapid deployment.