transmissible

Every time a bird flu virus infects a person, concerns grow that it could change, becoming more transmissible or more deadly.

Skipper’s other primary motivational device — besides his highly transmissible energy — has been slogans.

The National Trust spokeswoman added: "Decaying marine mammals pose a serious health risk. They can carry a range of diseases that are transmissible to humans and dogs."

Rasmussen said the worry now is that if H5N1 mutates to become transmissible between people, it’ll be young children as well as the old and compromised who are likely to be most affected.

The intelligence service had indications that the Wuhan Institute of Virology had been carrying out experiments where viruses are modified to become more transmissible to humans for research, they say.