KOMO News reported that First Lady Jill Biden visited Washington State this week. The first lady's husband didn't accompany her, however, a fact which may spur further concerns over his health. 

According to the television station, Mrs. Biden's plane touched down at King County International Airport in Seattle on Thursday evening.

First lady toured cancer facility

A statement issued by the first lady's office explained that the next day saw a scheduled stop at the Fred Hutchinson Cancer Center.

Her visit was meant "to highlight the importance of supporting cancer survivors through specialized care and research, including survivors of childhood cancers and breast cancer."

After her visit to the Fred Hutchinson Cancer Center this afternoon, the first lady will speak at Shoreline and Mercer Island.https://t.co/LpK8VLwDfu

— KOMO News (@komonews) September 22, 2023

One area of interest was Dr. Cyrus Ghajar, whose research focuses "on metastatic breast cancer among breast cancer survivors and is supported with a grant from the U.S. Department of Defense."

Mrs. Biden has traveled extensively without the president

Lynch is president and director of the Fred Hutchinson Cancer Center while Morgan serves on the organization's board of directors.

This is far from being the first time that Mrs. Biden has traveled without her husband, as The Times of Israel reported in May that she embarked on a solo tour of the Middle East, North Africa, and Europe.

Her itinerary included attending the wedding of Jordanian Crown Prince Al Hussein bin Abdullah II to architect Rajwa Khalid Alseif as well as focusing on building opportunities for women and young people in Egypt and Morocco.

Poll finds two thirds of Democrats believe Joe Biden is too old

What's more, she represented the United States at British King Charles' coronation earlier in the month. This apparently resulted from concerns that her husband would be overtaxed by the experience.

The Daily Telegraph cited an unnamed White House source as saying that the president stayed home due to fears that Biden did not have enough energy to attend the event given how he was already scheduled to visit Northern Ireland and the G7 summit in Japan.

"The guy is 80," the source remarked before explaining that White House staff "space out his big bursts of activity quite considerably."

Meanwhile, an August NORC Center for Public Affairs Research survey found that roughly two-thirds of Democrats believe President Joe Biden is too old to serve another term in office.