The new COVID-19 vaccines from Pfizer and Moderna seem to be remarkably good at preventing serious illness. But it's unclear how well they will curb the spread of the coronavirus. "Preventing severe disease is easiest, preventing mild disease is harder, and preventing all infections is the hardest," said Deepta Bhattacharya, an immunologist at the University of Arizona College of Medicine - Tucson. "If it's 95% effective at preventing symptomatic disease, it's going to be something less than that in preventing all infections, for sure."

New COVID-19 restrictions in California have caused the San Francisco 49ers to play two home games at the State Farm Stadium in Glendale instead. "We're not only going to be a playground, but we're going to be a breeding ground for COVID-19. It's definitely a recipe for disaster. Now's not the time to be promoting tourism or having sports teams come to our home turf," said Dr. Shad Marvasti, director of public health, prevention and health promotion with the University of Arizona College of Medicine – Phoenix.

Gov. Doug Ducey won't impose any new restrictions on individuals or businesses despite what appears to be a record number of daily COVID-19 cases and a trend that is pushing even higher. And he has are no plans to extend a moratorium on residential evictions once a federal ban on ousting tenants expires at the end of the month. In his latest forecast, Joe Gerald at the Zuckerman College of Public Health at the University of Arizona, predicted dire problems with access to critical care due to shortages of space, personnel and critical supplies.

Research moves from education about skin cancer risk to risk reduction.

Continuing coverage: Women who use tanning beds or who sunbathe are at increased risk for endometriosis, according to new research. Leslie V. Farland, an assistant professor of epidemiology at the University of Arizona Mel and Enid Zuckerman College of Public Health, is the lead author of the study.

Umbilical cord blood is full of stem cells, so it can be transplanted into patients to treat certain types of cancers, diseases and blood disorders. Umbilical cord blood works as an alternative for many patients who can’t find bone marrow transplants. But the odds that someone will develop a disease like cancer that would require an umbilical cord blood transplant are slim, about one in 1,000 or one in 2,000, according to University of Arizona umbilical cord blood stem cell researcher David Harris in the Department of Immunobiology at the College of Medicine - Tucson.

According to Arizona's COVID-19 vaccination plan, teachers in Arizona, along with health care workers, will be among the first group of people to get the vaccine. "Schools should be the last thing to close, and they should be the first to reopen, and that should be the priority. I think we should be offering teachers the vaccine and including them as part of the first-line health care workers. Education and mental health are very important to children, and it is just as important as the physical health of our population," said Dr. Shad Marvasti, director of public health, prevention and health promotion with the University of Arizona College of Medicine – Phoenix.

Ricardo Correa, MD, program director of the Endocrinology, Diabetes, and Metabolism Fellowship and director of diversity and inclusion for graduate medical education at the University of Arizona College of Medicine-Phoenix, is included in Medscape's list of 25 young physicians who are rising stars in medicine, poised to become future leaders of their fields.

Joe Gerald, an associate professor in the Mel and Enid Zuckerman College of Public Health and a member of the University of Arizona's COVID-19 modeling team, is interviewed about what current trends indicate about the severity of the coronavirus crisis.

Dr. Shad Marvasti, director of public health, prevention and health promotion with the University of Arizona College of Medicine – Phoenix, said that news of a vaccine is cause for optimism – but he cautions that much of 2021 will still require social distancing and mask wearing. "Hopefully if we do that, if we can be strong in this resolve, then we can get back to some kind of normal life post-vaccination, later I would say in 2021," Marvasti said. "Realistically, the majority of people aren't going to have access to this vaccine until late spring or early summer."