It would be quite scary if in the event of a release of Smallpox, the response were this slow.
While happily no one knows how effective small pox vaccines given in the 50s are today, at least I have been vaccinated. And the vaccine is supposed to prevent the disease as opposed to ‘lessen the severity’.
Monkeypox is a zoonotic disease unlike Smallpox. It can be spread from animals to people and likely from people to animals. So far only animals in Africa have endemic Monkeypox. It would be catastrophic if it got spread from humans to animals in North America, South America, Europe, Africa, and Australia. Do you really want to have to add Monkeypox on to the required childhood vaccines to protect against exposure from animals? We already have to vaccinate pets against Rabies; in Texas rabies vaccinations are required every year. I would rather not have to require vaccination of pets.
But, getting a first vaccination in childhood decreased the risk of serious side effects when getting a booster if needed as an adult. Seriously the Smallpox vaccine was the most dangerous vaccine in use in the 20th century. The Jynneos vaccine was developed from a strain of Vaccinia developed in the 1960's by passing it through almost 700 transfers between chicken cell cultures. It is unable to replicate in mammalian cells. This makes it much safer. If you gave the ACAM2000 vaccine to people with AIDS, it would kill them. The Jynneos vaccine has been given to many people with AIDS.