Carla McDonnell

What they built

Carla McDonnell invented Vax Chill, a compact portable cooling system designed to keep livestock vaccines at the correct temperature on farms. Growing up on a farm in Co. Louth, she witnessed firsthand the costly problem of vaccine spoilage due to temperature fluctuations. Her device reduces wastage of expensive, temperature-sensitive doses and helps rural farmers protect their livestock more effectively.

Verified track record

• [PictureURL Finder] Found stable direct portrait image on high-priority Agriland article (Dec 21, 2025): (source page: https://www.agriland.ie/farming-news/louth-teen-innovates-with-livestock-vaccine-cooling-system/). (source)