According to the CDC, 46% of Texans have been fully vaccinated.
The United States is facing a COVID-19 surge this summer as the more contagious delta variant spreads.
More than 620,000 Americans have died from COVID-19 and over 4.3 million people have died worldwide, according to real-time data compiled by the Center for Systems Science and Engineering at Johns Hopkins University.
Just 59.1% of Americans ages 12 and up are fully vaccinated against COVID-19, according to data from the Centers for Disease Control and Prevention.
All school staff in California must get vaccinated or be tested weekly, becoming the first state in the nation to make this a mandate, Gov. Gavin Newsom announced Wednesday.
"It's the right thing to do," the governor said, adding that he thinks this will "significantly increase vaccination rates" across the state.
All Amtrak employees must be fully vaccinated by Nov. 1 or get tested weekly, Amtrak said in an internal memo.
United Airlines, Delta Air Lines, Hawaiian Airlines and Frontier Airlines have all made similar vaccine policy changes.
-ABC News' Mina Kaji
WHO Director General Dr. Tedros Adhanom Ghebreyesus on Wednesday announced Solidarity PLUS, a new trial involving thousands of researchers in 52 countries to test three drugs as potential COVID treatments: artesunate, a treatment for severe malaria; imatinib, a drug for certain cancers; and infliximab, a treatment for immune system disorders such as Crohn’s disease.
In October, the WHO reported results of the Solidarity Trial, which tested four drugs as potential COVID-19 treatments: remdesevir, hydroxychloroquine, lopinavir and interferon. The trial, which involved nearly 13,000 patients in 30 countries, showed all four drugs had little or no effect on hospitalized patients with COVID-19. Final results from the Solidarity Trial are expected next month.
-ABC News' Christine Theodorou
The Centers for Disease Control and Prevention on Wednesday strengthened its recommendation for vaccines during pregnancy.
The CDC's update is based on new evidence that the vaccine officially poses no safety concerns for pregnant people vaccinated late in pregnancy, or for their babies, and no increased risk for miscarriage. The CDC also found no increased risk of miscarriage among people who got vaccinated during the first trimester.
Pregnant people were not initially included in the clinical studies for the vaccines so the CDC couldn't definitively say vaccines were safe and effective -- though it's long been recommended by officials. Last week, two of the nation's leading women's health organizations, the American College of Obstetricians and Gynecologists (ACOG) and the Society for Maternal-Fetal Medicine (SMFM), came out in full support of vaccinations for pregnant people.
Just 23% of pregnant people received one dose of a vaccine during pregnancy as of July 31, according to CDC data.
-ABC News' Cheyenne Haslett
