Axios

Former President Barack Obama has tested positive for COVID-19, he announced on Twitter on Sunday.

What they're saying: "I’ve had a scratchy throat for a couple days, but am feeling fine otherwise. Michelle and I are grateful to be vaccinated and boosted, and she has tested negative," the 60-year-old former president wrote.

• "It’s a reminder to get vaccinated if you haven’t already, even as cases go down."

A fourth dose of the COVID-19 vaccine will be necessary in order to maintain manageable levels of hospitalizations and mild infections, Pfizer CEO Albert Bourla told CBS' "Face the Nation" on Sunday.

Driving the news: While fourth doses are already authorized for some immunocompromised people, NIAID director Anthony Fauci said last month that the possibility of another round of boosters was being "very carefully monitored."

It's been two years since the U.S. suddenly closed down to stop the spread of COVID-19.

Why it matters: People are tired of their pandemic lives, and these photos show the relief in reemergence.

The mystery of how SARS-CoV-2 may cause brain fog or other neurological symptoms in some people is driving new global research.

Why it matters: Roughly 79 million Americans contracted COVID-19 in the first two years of the pandemic. While most survived, many are grappling with long-term symptoms, or long COVID, that affect the brain and other body systems.

Pharmacies that say they've been a linchpin in the U.S. pandemic response are pressing for key regulatory changes and higher payment rates to cement their enhanced role in patient care.

Why it matters: Pharmacies have become fixtures of pandemic life through testing, vaccinations and, increasingly, dispensing antivirals. But pharmacists say they're being shortchanged, because they can't prescribe COVID pills and receive prohibitively low fees to dispense them.

The Centers for Disease Control and Prevention (CDC) will end a Trump-era order that expelled unaccompanied child migrants, the agency announced late Friday night.

Why it matters: Title 42, enacted in March 2020, was introduced as a public health policy to prevent the spread of COVID-19. The controversial bill is currently being litigated with the ACLU calling it "inhumane."

Travis County District Judge Amy Clark Meachum on Friday issued a statewide temporary injunction against Texas Gov. Greg Abbott's (R) directive, which ordered the state to investigate parents for child abuse if they seek gender-affirming care for their children.

Driving the news: A supervisor for the Texas Department of Family and Protective Services testified on Friday that investigators were required to prioritize cases involving parents of transgender children but were prohibited from closing them if they determined that the case likely did not involve child abuse, according to media reports of video footage from a state district court hearing.