“It’s really an exaggerated cold response: When our body is cold it’s normal for our blood vessels at the periphery, such as in our fingers, to narrow to conserve core body heat,” said Dr. Emily Kiemig, a dermatologist and assistant professor at Northwestern’s Feinberg School of Medicine in Chicago, who specializes in connective tissue and autoimmune diseases of the skin, and frequently cares for patients with Raynaud’s.

Maryann Mason, PhD, director of violence and injury research at Northwestern University’s Feinberg School of Medicine’s Buehler Center for Health Policy and Economics, evaluated a violence interruption program in Chicago, initially focusing on the role of mentoring at-risk young men in violence prevention.

Officials already struggle to interpret reams of data from different tests that can produce different results, said Gerardin, an assistant professor at Northwestern University’s Feinberg School of Medicine.

Cases are already skyrocketing, and many people are experiencing “caution fatigue” — becoming desensitized to warnings out of exhaustion from observing safety guidance, said Jackie Gollan, a clinical psychologist and a professor of psychiatry at Northwestern University Feinberg School of Medicine, who conducts research on how to make better decisions.

“Our findings show neurological manifestations are very common in these patients,” Igor Koralnik, MD, chief of neuro-infectious diseases and global neurology in the Ken & Ruth Davee Department of Neurology at Northwestern Medicine, told ABC News.

“Folks are noticing [seasonal depression] a lot more because of trying to maintain their social distancing and quarantine and follow the rules related to stay-at-home,” said Dorothy Sit, an associate professor of psychiatry and behavioral sciences at Northwestern University’s Feinberg School of Medicine.

The double lung transplant surgery for critical COVID-19 patients, which was first performed in the U.S. at Northwestern in June, has now been done seven times at the Chicago hospital by Dr. Ankit Bharat, chief of thoracic surgery and surgical director of the Northwestern Medicine Lung Transplant Program, and a team of surgeons.

“Because passengers may not wear masks properly, or may lower masks to eat and drink, extra space, like an empty middle seat, can still matter,” said Mercedes Carnethon, vice chair of the department of preventive medicine and a professor of epidemiology at Northwestern University’s Feinberg School of Medicine.

People who used disposable e-cigarettes were less likely to suffer these symptoms, indicating that part of the problem comes from experimentation with unregulated ingredients and untested devices, said senior researcher Dr. Thanh-Huyen Vu, a research associate professor of epidemiology at Northwestern University Feinberg School of Medicine in Chicago.