A new study suggests an experimental drug could mark an important advance against Valley fever, a serious infection that has become a growing concern in California. Researchers reported that more than 70% of people with severe cases showed improvement after starting the medication.

The findings stand out because doctors have long faced limited options when treating difficult Valley fever infections. With case numbers climbing in California, the need for better therapies has become more urgent, especially for patients whose illness is more severe.

While the treatment remains experimental, the study points to a potentially meaningful shift in how physicians may be able to manage the disease. The results indicate the drug may help a substantial share of patients who previously had fewer effective paths forward.

More research will be needed to confirm how well the medication works and how broadly it can be used. Even so, the early data offers encouraging signs at a time when Valley fever continues to pose a growing health challenge in the state.