Should you be worried about Mpox, formerly known as monkeypox? Mpox has been increasingly reported and linked to travel and imported animals; over the last year, more than 30,000 cases have been reported in the USA. This virus is transmissible from person to person and animal to person. Cases may be severe, especially in children, pregnant women, or people with suppressed immune systems. Here's what you need to know to boost your immune system.