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Sen. Bill Cassidy. Photo: Toni L. Sandys-Pool/Getty Images

Sen. Bill Cassidy (R-La.) said Thursday that he tested positive for the coronavirus, and is "strictly following the direction of our medical experts" by quarantining, local ABC affiliate WBRZ reports.

The big picture: Cassidy is the second senator to test positive, following Rand Paul (R-Ky.) in March. Cassidy said after being notified Wednesday night that he was exposed to someone with the virus, he was tested and plans to notify all those he came in contact with since.

Go deeper

Nov 27, 2020 - Health

WHO: AstraZeneca vaccine must be evaluated on "more than a press release"

A medical syringe and vial with fake coronavirus vaccine in front of the World Health Organization (WHO) logo. Photo Illustration: Pavlo Gonchar/SOPA Images/LightRocket via Getty Images

Top scientists at the World Health Organization on Friday called for more detailed information on a coronavirus vaccine developed by AstraZeneca and the University of Oxford.

Why it matters: Oxford and AstraZeneca have said the vaccine was 90% effective in people who got a half dose followed by a full dose, and 62% effective in people who got two full doses. AstraZeneca has since acknowledged that the smaller dose received by some participants was the result of an error by a contractor, per the New York Times.

In photos: Black Friday shopping across the U.S.

Customers shop at Macys on Nov. 27 in New York City. Photo: Kena Betancur/AFP via Getty Images

Many Americans braved shopping malls and department stores to shop in-person on Black Friday.

Why it matters: Coronavirus infections are still on the rise across much of the U.S. during a season of travel and holiday gatherings. Hospitals across the country, especially in rural areas, are still overwhelmed.