Grey's Anatomy S22E05 Promo: Shocking Twists & Returns

Grey’s Anatomy season 22 episode 5 Promo: Sometimes I Feel Like a Motherless Child
There are some unexpected returns, like McCreary, but there are also some that make sense given the hospital's layout. Grey's Anatomy season 22 episode 4 has Jackson Avery's return, which is probably directly related to Meredith's storyline.

The advertisement mentions that Koracick is releasing his research on Alzheimer's, even though it was solely conducted on male mice. Not only did Catherine choose to employ Koracick to carry out the research that Meredith had covertly initiated, but he also declined to do tests on female mice, as we discovered in season 22 of Grey's Anatomy. Hormones were the cause.
He decided to ignore the women and concentrate on the men instead of being a competent doctor and researcher and dealing with the hormones that were affecting the outcomes. If Alzheimer's exclusively afflicted men, that would be OK, but it doesn't. As women make up the majority of those affected, Meredith and Amelia both recognize the need for hormone-focused study.
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