It's probably nothing.
From The Wall Street Journal via MSN, November 9:
HONG KONG—An unusual cluster of cancer cases among Chinese researchers affiliated with one of the country’s top oncology laboratories has attracted a wave of public attention, leading to new questions around lab safety.
Two surgeons at Sun Yat-Sen Memorial Hospital in the southern city of Guangzhou were diagnosed with cancer in June and October this year, the hospital said Wednesday. Both had previously worked in the hospital’s highly regarded breast-cancer research laboratory.
A visiting scholar who worked at the lab until April of last year was also diagnosed with cancer at some point this year, the hospital said.
Reports of back-to-back cancer diagnoses among researchers at the lab began to circulate on Chinese social media earlier this week. The hospital’s partial confirmation of those reports has fueled a wave of public interest, with many internet users questioning whether the cases were caused by carcinogenic substances being studied at the lab and whether other cancer diagnoses connected to the facility would emerge.
The laboratory operates in strict accordance with standards and all members of its laboratory staff have received safety training, the hospital said.
“In response to concerns that the cancer diagnoses are linked to the laboratory or contact with test reagents, the causes of cancers are extremely complicated,” the hospital said. “We sincerely welcome relevant agencies to organize third-party organizations to review and investigate.”
The two surgeons, surnamed Huang and Liu, worked in the hospital’s breast-cancer laboratory as medical students, according to the hospital. Huang was diagnosed with pancreatic cancer and Liu was diagnosed with synovial sarcoma, a rare form of cancer that occurs in soft tissues such as muscles and ligaments....
....MUCH MORE
Chinese netizens were spreading the rumor that the lab was demolished. The hospital responded that this was not true. On Tencent's QQ:
https://new.qq.com/rain/a/20231108A09ZL200
Guangzhou Zhongshan No. 2 Hospital Breast Tumor Laboratory has been dismantled? Hospital response: coincidental fire inspection