Offering Fast On-Site RT-PCR Testing. Need COVID-19 testing before traveling? We will come to you. Express Healthcare is pleased to offer fast, reliable RT-PCR and antigen testing services at our partnering DC Metropolitan areas hotels. As COVID-19 continues, many airlines or countries ask for proof of COVID-19 clearance within a specific timeframe or window. Our fast turnaround time and testing method that meets airlines and destination country requirements allow you to travel easily. With Express Healthcare, you will receive your results within 12 hours, allowing you to travel with peace of mind.