Thank you for your driver who retrieved empty 02 cannisters from my front walk today and replaced them with fresh. My concentrator check could not be done as I was hospitalized with status asthmaticus. COVID NEGATIVE..BTW, I have had my pneumonia vaccine. The flu vaccine from Valley Drug was contraindicated for me as it contains polymixin, bacitracin and neomycin., all of which I am allergic.. The 02 tank you delivered for me to use in transit home can be retrieved next time you're here.. Thank you so much. Shirley Anderson DOB: 05/23/1949. 509-722-3029. 5014 Columbia River Road, #4, Huters, WA 99137.