A new way to vaccinate cattle

A new approach to vaccinating cattle could help farmers worldwide, research suggests.

Scientists have developed a technique using a harmless parasite, which lives in cows but has no effect on their health, to carry medicines into the animals' bloodstream.

Researchers created the vaccine by inserting key genetic material from a vaccine into the parasite's DNA.
The manipulated parasite is intended to be injected into cattle, where it would continue to thrive in their bloodstreams, releasing small amounts of vaccine slowly over time. More >>