Anyone who receives a call from the Oak Park Public Health Department or any certified health department may have tested positive for COVID-19 or had close contact with someone who has tested positive for the highly contagious coronavirus. The importance of answering or returning the call can’t be overemphasized, officials say, because you could be at risk of becoming ill or spreading the virus unknowingly. Calls from the Oak Park Health Department will most often come from a phone number with the prefix 708.358.xxxx. Officials will leave a voice message if they are unable to connect with you.