Canada issued a monkeypox-related travel notice on Tuesday, advising travelers to over two dozen countries, including Australia, Britain and the United States, to take precautions and warned of potential delays returning home if they fell ill.

In a level 2 notice – one grade below a call to avoid non-essential travel – the Public Health Agency of Canada said travelers may be subject to procedures to limit the spread of monkeypox, such as isolation, should they become infected.