There have been reports of Rocky Mountain spotted fever (RMSF) in people traveling to the United States from Tecate, in the state of Baja California, Mexico.

There is an outbreak of mpox in 22 out of 26 provinces, including urban areas, in the DRC.

There is an outbreak of diphtheria in several districts in Guinea. Vaccination against diphtheria is essential to protect against disease. If you are traveling to an affected area, you should be up to date with your diphtheria vaccines.

Dengue is a risk in many parts of Central and South America, Mexico, and the Caribbean. Some countries are reporting increased numbers of cases of the disease. Travelers to the Americas can protect themselves by preventing mosquito bites.

Many international destinations are reporting increased numbers of cases of measles.

When a long-time patient, seeking to restore her hard-won sense of control after being diagnosed with an incurable cancer, requests a prescription for Seconal, what should her physician do?

A 37-year-old woman presented with a 10-day history of abdominal pain. Physical examination was notable for a gravid abdomen. An MRI showed a nongravid uterus and a normally formed intraabdominal fetus.

There are various possible futures for regulation of artificial intelligence in the United States. The history of rules governing the treatment of human subjects could hold important insights.

Comparing PET scans of more than 90 adults with and without mild cognitive impairment (MCI), Johns Hopkins Medicine researchers say relatively lower levels of the so-called "happiness" chemical, serotonin, in parts of the brain of those with MCI may play a role in memory problems including Alzheimer's disease.

A study of more than 50 babies through 2 yeard old in Africa, Asia, North America and South America has added substantially to evidence that giving antiretroviral therapy (ART) to newborns with HIV within the first days -- rather than within weeks or months -- of life can safely suppress amounts of HIV in the blood to undetectable levels. Findings of the study, which was co-led by Johns Hopkins Children's Center physician-scientist and researcher Deborah Persaud, M.D., and sponsored by the National Institutes of Health (NIH) and the International Maternal Pediatric Adolescent AIDS Clinical Trials Network, were published Dec. 4 in the journal The Lancet HIV.

Johns Hopkins physicians can offer expert advice on how to have a healthy and safe holiday season.