As of Tuesday, 22 children and two adults had been infected, all of whom were unvaccinated, local officials said.

The vets had no symptoms, and one worked only in states where no dairy infections had been reported.

President Trump’s pause on aid, and the gutting of the primary aid agency, could jeopardize the health of more than 20 million people worldwide, including 500,000 children, experts say.

A new version of the virus is widespread in wild birds but had not previously been detected in cows.

Some oncologists suggest that, for certain early cancers not at risk of spreading, the term “cancer” should be avoided.

A pandemic is not inevitable, scientists say. But the outbreak has passed worrisome milestones in recent weeks, including cattle that may have been reinfected.

The cases have spurred new pet food safety rules and poultry surveillance efforts.

For 14 years, scientists have been growing a tree akin to the Judean balsam — the source of the balm of Gilead — but with no modern counterpart.