Patient Care Army Spc. Abner Torres assists a patient after administering a COVID-19 vaccine at the Puerto Rico National Guard’s vaccination center in Caguas, Puerto Rico, March 1, 2021. Torres and other guardsmen at the center are wearing powered air-purifying respirators, which are face masks that have an air filtration system to promote better airflow. SHARE: Download: Full Size (0.9 MB) Tags: Health, Army, national guard, Coronavirus, covid19vaccine Credit: Army Staff Sgt. Alexis Vélez, Puerto Rico, Army National Guard VIRIN: 210301-Z-HW727-137A.JPG Photo Gallery