That is an interesting study, thanks for the link. You missed a couple relevant bits though: "Certain enveloped (lipophilic) viruses (e.g., herpes sim-plex vir

That is an interesting study, thanks for the link. You missed a couple relevant bits though: "Certain enveloped (lipophilic) viruses (e.g., herpes sim-plex virus, human immunodeficiency virus [HIV], influenzavirus, respiratory syncytial virus, and vaccinia virus) are susceptible to alcohols when tested in vitro" Covid-19 is an enveloped virus, not a bacteria. Unfortunately relative efficacy compared to soap and water for these types of viruses doesn't appear to be discussed. and "Applying small volumes (i.e., 0.2–0.5 mL) of alcohol to the hands is not more effective than washing hands with plain soap and water (63,64). One study documented that 1 mL of alcohol was substantially less effective than 3 mL (91). The ideal volume of product to apply to the hands is not known and may vary for different formulations. However, if hands feel dry after rubbing hands together for 10–15 seconds, an insufficient volume of product likely was applied." More or less saying that technique matters here, and a quick squirt of hand sanitizer may not do much. That being said, hand washing technique matters too: commonly poorly washed areas include between fingers, finger tips, under fingernails, and the thumb.