A new study adds to the evidence that vitamin D can help fight some forms of cancer. The study, which was led by researchers at Roswell Park Comprehensive Cancer Center and Kaiser Permanente, shows that women with higher levels of vitamin D when diagnosed with breast cancer experienced longer cancer-free survival and were about 30% less likely to die from the disease.

Immunotherapy, which uses the body’s own immune system to fight disease, is transforming the treatment of several types of cancers. Severe adverse effects can result from these groundbreaking cancer treatments, however, and when they do, it’s important to recognize and quickly address them, researchers write in the New England Journal of Medicine.

The first comprehensive study analyzing follow-up care among childhood cancer survivors concludes that fewer than than half of the adult survivors of childhood cancers — who remain at greater risk for chronic illnesses — receive adequate long-term follow-up care.