Yes, especially young children who have no immunity... BTW, another Wisconsin health care worker has contracted monkeypox. This case is also thought to be from human-to-human contact.
Yes, I gave a couple of links in the "Monkeypox May Have Spread From Person To Person". Also, the boyfriend of one of the health workers has developed a suspicious rash. If that turns out to be monkeypox, it will be a case of tertiary spread.
On children doing badly, a different child has now developed encephalitis from monkeypox. Not good.