COVID-19 presents great challenges for the police, firefighters, paramedics and other essential workers who are tasked with keeping their communities safe and stable during uncertain times. Stanford Medicine experts answer your questions, provide up-to-date information, and help you determine if you should be tested for the coronavirus.

* Use a screening questionnaire to determine whether testing is recommended for you, based on your symptoms, medical history and exposure. Results are saved for your future reference, and all answers are securely stored on your device. No data is shared with Stanford, Apple or anyone else unless you grant permission.

* View the latest COVID-19 resources from Stanford Medicine physicians and scientists, including a comprehensive list of frequently-asked questions, an easy-to-understand guide for protecting yourself, and videos of weekly virtual town hall meetings, in which Stanford Medicine leaders update the community on the pandemic and its implications.

* Learn about the risks that COVID-19 presents first responders and essential workers, and how to protect yourself. Stanford Medicine emergency medicine experts answer your questions about potential exposure, safety and best practices. Local agencies and national organizations offer detailed guidance and recommendations for avoiding infection and containing the outbreak.

Stanford Medicine integrates research, medical education and health care at its three institutions — Stanford University School of Medicine, Stanford Health Care and Lucile Packard Children’s Hospital Stanford. For more information, please visit med.stanford.edu.