The civil rights pioneer was vaccinated in January.
The United States is facing a COVID-19 surge this summer as the more contagious delta variant spreads.
More than 628,000 Americans have died from COVID-19 while over 4.4 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 59.9% of Americans ages 12 and up are fully vaccinated against COVID-19, according to data from the Centers for Disease Control and Prevention.
The 35,000 runners at this year's Chicago Marathon must provide proof of vaccination or a negative test administered within 72 hours.
The marathon is set to take place Sunday, Oct. 10.
-ABC News' Joshua Hoyos
There were 209,988 new cases of COVID-19 confirmed in the United States on Monday, according to a real-time count kept by Johns Hopkins University, although that data likely includes a backlog from the weekend.
This is the third time this month that the U.S. has reported more than 200,000 newly confirmed infections in a single day.
Many states are no longer reporting COVID-19 data daily. Single-day case totals, particularly early on in the week, may be skewed as a result of a backlog release of data.
Bangladesh has launched a COVID-19 vaccination program for Rohingya refugees housed in one of the world's largest and most densely populated camps in Cox's Bazar, according to a press release from the World Health Organization.
The campaign, led by the Bangladeshi government with technical support from the WHO and other partners, is initially targeting nearly 48,000 Rohingya refugees who are 55 and older. It's part of Bangladesh's national deployment and vaccination plan to ensure equity and fair allocation of vaccines across the country.
"Bangladesh is demonstrating what WHO has been advocating for -- equitable access to vaccines," Dr. Poonam Khetrapal Singh, regional director of the WHO South-East Asia Region, said in a statement Monday. "Inclusion is key to protecting vulnerable populations like the refugees, for safeguarding their health and that of their host communities and societies."
More than 1 million Rohingya -- a stateless ethnic group who predominantly practice Islam -- are sheltering in crowded camps in Bangladesh after fleeing persecution in Buddhist-majority Myanmar.
The Biden administration could soon be urging Americans to get a booster shot eight months after completing their original vaccination, a source familiar with the discussions told ABC News Monday.
Federal health officials and experts are currently coalescing around the idea that all Americans should receive a booster, the source said. Those booster shots could be rolled out as soon as mid to late September -- pending Food and Drug Administration authorization.
The announcement, first reported by The New York Times and The Washington Post, could come as soon as this week.
The new timeline for the booster shots in a significant shift for the administration, which previously had been non-comital on when boosters for the majority of Americans would be needed.
-ABC News’ Molly Nagle
