Science

A passing car's headlights illuminate a darkened Bourbon Street in the French Quarter of New Orleans, Wednesday, Oct. 28, 2020. Hurricane Zeta passed through Wednesday leaving much of the city and metro area without power. (AP Photo/Gerald Herbert)

FILE - This microscope image made available by the National Cancer Institute Center for Cancer Research in 2015 shows human colon cancer cells with the nuclei stained red. A panel of health experts wants U.S. adults to start getting regular colon cancer screenings at age 45, five years earlier than it now recommends. While overall, colon cancer rates have been declining, the draft guidelines issued Tuesday, Oct. 27, 2020, by the U.S. Preventive Services Task Force reflect a growing concern about rising rates in younger people. (NCI Center for Cancer Research via AP, File)

FILE - Vice President Mike Pence listens during the vice presidential debate Wednesday, Oct. 7, 2020, at Kingsbury Hall on the campus of the University of Utah in Salt Lake City. Health policy specialists are questioning Pence’s claim that federal rules on essential workers allow him to continue to campaign and not quarantine himself after exposure to multiple close staffers with COVID-19. (AP Photo/Patrick Semansky, file)

FILE - In this April 16, 2020, file photo, a Pacific Gas & Electric sign is displayed on the exterior of a PG&E building in San Francisco. Pacific Gas & Electric will cut power to over 1 million people on Sunday to prevent the chance of sparking wildfires as extreme fire weather returns to the region, the utility announced Friday, Oct. 23, 2020. (AP Photo/Jeff Chiu, File)

FILE - In this Wednesday, June 24, 2020 file photo, a volunteer receives an injection at the Chris Hani Baragwanath hospital in Soweto, Johannesburg, as part of Africa's first participation in a COVID-19 vaccine trial developed at the University of Oxford in Britain in conjunction with the pharmaceutical company AstraZeneca. On Friday, Oct. 23, 2020, AstraZeneca Inc. announced that the Food and Drug Administration is letting it resume testing of its COVID-19 vaccine candidate in the U.S. (Siphiwe Sibeko/Pool via AP)

FILE - This Dec. 11, 2019 file photo shows gravestones at a cemetery in New Jersey. The U.S. suicide death rate fell slightly in 2019, the first annual decline in more than a decade, according to new government data. (AP Photo/Seth Wenig)

Democratic presidential candidate former Vice President Joe Biden speaks during the second and final presidential debate Thursday, Oct. 22, 2020, at Belmont University in Nashville, Tenn., with President Donald Trump. (AP Photo/Julio Cortez)

FILE - In this March 2020 photo provided by Gilead Sciences, rubber stoppers are placed onto filled vials of the investigational drug remdesivir at a Gilead manufacturing site in the United States. On Thursday, Oct. 22, 2020, the U.S. Food and Drug Administration has approved the first drug to treat COVID-19: remdesivir, an antiviral medicine given through an IV for patients needing hospitalization. The drug, which California-based Gilead Sciences Inc. is calling Veklury, cut the time to recovery by five days on average in a large study led by the U.S. National Institutes of Health. (Gilead Sciences via AP)

Alphina Kamara at Wesleyan University, Saturday, Oct. 17, 2020, in Middletown, Conn. Kamara, a junior at Wesleyan University studying English and sociology, says she was never encouraged to explore options like an engineering course while in high school. (AP Photo/Jessica Hill)

In this photo provided by Cincinnati Children’s Hospital Medical Center, clinical research coordinator Tammy Lewis-McCauley administers an injection to Katelyn Evans, a trial participant, as part of the hospital’s clinical trial of Pfizer's COVID-19 vaccine at Cincinnati Children’s Hospital Medical Center on Wednesday, Oct. 14, 2020. (Cincinnati Children’s Hospital Medical Center via AP)