Unvaccinated people 11 times more likely to die in COVID-19 delta surge
The unvaccinated were six times more likely to get the virus in August.
The United States has been facing a COVID-19 surge as the more contagious delta variant continues to spread.
More than 722,000 Americans have died from COVID-19 while over 4.8 million people have died from the disease worldwide, according to real-time data compiled by the Center for Systems Science and Engineering at Johns Hopkins University.
Just 66.5% of Americans ages 12 and up are fully vaccinated against COVID-19, according to data from the CDC.
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Fauci: Best way to avoid resurgence is getting more Americans vaccinated
Dr. Anthony Fauci told CNN Monday night that "the best way to assure that decline in cases, hospitalizations and deaths [will] continue is to continue to get a lot more people vaccinated."
"We need the overwhelming proportion of those unvaccinated people to get vaccinated. Then we can be quite confident that if we can do that, you will not see a resurgence," Fauci said.
About 68 million eligible Americans remain completely unvaccinated.
Despite continued pushback, Fauci said that newly implemented vaccine mandates are working.
"Sometimes mandates can help. As sensitive an issue as that is, it is really getting people more vaccinated," Fauci said.
-ABC News' Arielle Mitropoulos
Abbott issues executive order banning vaccine mandates in Texas
Gov. Greg Abbott announced Monday that he issued an executive order that bans vaccine mandates "by any entity" in Texas.
The executive order prohibits entities from issuing a mandate to anyone who "objects to such vaccination for any reason of personal conscience, based on a religious belief, or for medical reasons, including prior recovery from COVID-19."
"The COVID-19 vaccine is safe, effective, and our best defense against the virus, but should remain voluntary and never forced," Abbott said in a statement.
The governor also announced that the issue over vaccine mandates will be addressed in a special session of the state legislature.
As of Monday evening, 72.4% of Texas residents over 12 have received one vaccine dose, according to the U.S. Centers for Disease Control and Prevention.
Texas's seven-day average for new daily COVID-19 cases is 7,447 as of Oct. 8, according to the CDC.
WHO advisory group recommends boosters for immunocompromised people
The World Health Organization's Strategic Advisory Group of Experts on Immunization is recommending boosters for moderately and severely immunocompromised people. The group is also recommending a third dose of China's Sinovac and Sinopharm vaccines for people 60 and older.
The WHO's Director-General had previously called for a moratorium on boosters, citing inequities in access to vaccines. High-income countries have administered 35 times more vaccine doses than low-income countries. Countries in the WHO Africa Region have only fully vaccinated 3% of their populations.
-ABC News' Christine Theodorou
Philadelphia Marathon requiring in-person participants to be fully vaccinated
All in-person runners must be fully vaccinated two weeks ahead of next month's Philadelphia Marathon, officials announced. Runners with only a negative test won't qualify.
The race is set for Nov. 21.