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| 800 BC || {{w|Disinfectant}} introduction || || The oldest reference to disinfection of premises with a chemical product seems to be that described by [[w:Homer (Homero)|Homer]] in book xii of the ''{{w|Odyssey}}'', where the hero, having killed his rivals, demands that sulphur be burnt in the house which they had occupied.<ref name="oie.int"/> ||
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| 1347–1348 || {{w|Social distancing}} ({{w|cuarantine}}) || {{w|Plague}} || "The term “quarantine” ''quarantine'' is derived from the Italian number “quaranta,” or 40, and with the practice originated in 1347-1348originating around this time, when during the “Black Plague” was sweeping Europe{{w|Black Plague}}."<ref>{{cite web |title=The Science of Social Distancing |url=https://asm.org/Articles/2020/April/The-Science-of-Social-Distancing |website=asm.org |accessdate=31 July 2020}}</ref> || {{w|Italy}}
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| 1363 || {{w|Disinfectant}} introduction || Wound infection || Alcohol as an {{w|antiseptic}} is recommended for wound treatment by French physician {{w|Guy de Chauliac}}.<ref name="Block">{{cite book |last1=Block |first1=Seymour Stanton |title=Disinfection, Sterilization, and Preservation |url=https://books.google.com.ar/books?id=3f-kPJ17_TYC&pg=PA229&lpg=PA229&dq=1363+++Alcohol+is+already+used+as+an+antiseptic.&source=bl&ots=KnIjEt4ON0&sig=ACfU3U19gDSSAKOZfh3tqGXdv6oIFH6fBQ&hl=en&sa=X&ved=2ahUKEwjF25rkucbpAhXwHrkGHSxCCB0Q6AEwDHoECAgQAQ#v=onepage&q=1363%20%20%20Alcohol%20is%20already%20used%20as%20an%20antiseptic.&f=false}}</ref> || {{w|France}}
| 1963 || Scientific development || Microbial infection || Guerin shows that desiccated microbes are more resistant to ozone than hydrated cells.<ref name="Rogers"/> ||
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| 1963 || {{w|Social distancing}} || || "In 1963 when American cultural anthropologist Edward T. Hall, a cultural anthropologist, coined coins the term ''proxemics '' to define studies about social distancing in everyday life, nobody thought that a virus, 100 times smaller than even a bacteria, would make human closeness a big problem. Hall’s concern was is that closer distances between two persons may increase visual, tactile, auditory, or olfactory stimulation to the point that some people may feel intruded upon and react negatively".<ref name="deasa">{{cite web |title=SOCIAL DISTANCING: ORIGINS AND EFFECTS |url=https://bcmj.org/blog/social-distancing-origins-and-effects |website=bcmj.org |accessdate=31 July 2020}}</ref> ||{{w|United States}}
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| 1964 || Disinfection method introduction || || {{w|Johnson and Johnson}} starts providing commercial {{w|gamma irradiation}}.<ref name="Rogers"/> ||
| 2015 || {{w|Hand washing}} || || A study of hand washing in 54 countries finds that on average, 38.7% of households practice hand washing with soap.<ref>{{cite web |title=The Importance of Handwashing (Infographic) |url=https://globalhandwashing.org/resources/the-importance-of-handwashing-infographic/ |website=globalhandwashing.org |accessdate=14 July 2020}}</ref> ||
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| 2015 || {{w|Social distancing}} || || "A 2015 study suggested suggests that long-term social isolation (in the absence of a threat like the current viral infection) increased increases the risk of mortality by 29% in such chronic conditions as {{w|heart disease}}, {{w|depression}}, and {{w|dementia}}. "<ref name="deasa"/> ||
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| 2018 || {{w|Contact tracing}} || || A patent application by {{w|Facebook}} discusses a {{w|Bluetooth}} proximity-based trust method of {{w|digital contact tracing}}.<ref>{{cite web |title=Proximity-based trust |url=https://patents.google.com/patent/WO2019139630A1/en |website=patents.google.com |accessdate=24 July 2020}}</ref> ||
