anaphylaxis

noun
ana·​phy·​lax·​is | \ ˌa-nə-fə-ˈlak-səs How to pronounce anaphylaxis (audio) \
plural anaphylaxes\ ˌa-​nə-​fə-​ˈlak-​ˌsēz How to pronounce anaphylaxis (audio) \

Definition of anaphylaxis

1 : hypersensitivity (as to foreign proteins or drugs) resulting from sensitization following prior contact with the causative agent

Examples of anaphylaxis in a Sentence

Recent Examples on the Web Britain has reported several cases of anaphylaxis among people who have received the Pfizer vaccine. Helen Branswell, STAT, "The curse of the incidental illness: Seen as side effects to Covid vaccinations, ailments may have little to do with them," 28 Dec. 2020 The compound is found in other drugs and is known to trigger anaphylaxis on rare occasions. Sarah Toy, WSJ, "Scientists Eye Potential Culprit Behind Covid-19 Vaccine Allergic Reactions," 26 Dec. 2020 The patient had a history of anaphylaxis, or severe allergic reactions. al, "Alabama patient recovering after allergic reaction to COVID vaccine," 23 Dec. 2020 Both of the health care workers who had severe reactions had histories of anaphylaxis. Joel Achenbach, Anchorage Daily News, "US health authorities launch study on rare allergic reactions to coronavirus vaccine," 21 Dec. 2020 British health officials have said that people with a history of anaphylaxis should avoid the Pfizer-BioNTech vaccine. New York Times, "Moderna Vaccine Is Highly Protective Against Covid-19, the F.D.A. Finds," 15 Dec. 2020 There have been no other reports of anaphylaxis in the state. al, "Alabama patient recovering after allergic reaction to COVID vaccine," 23 Dec. 2020 Currently the observation period recommended by the CDC is 30 minutes after the vaccination if an individual has a history of anaphylaxis due to any cause. Chronicle Advice Team, SFChronicle.com, "Allergic reactions to the coronavirus vaccine: Should I be concerned?," 23 Dec. 2020 But any case of anaphylaxis, which can be life-threatening, is an emergency. Sarah Jacoby, SELF, "Severe Allergic Reactions Are a Rare But Possible Side Effect of COVID-19 Vaccines," 22 Dec. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'anaphylaxis.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of anaphylaxis

circa 1905, in the meaning defined at sense 1

History and Etymology for anaphylaxis

New Latin, from ana- + prophylaxis

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Time Traveler for anaphylaxis

Time Traveler

The first known use of anaphylaxis was circa 1905

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Statistics for anaphylaxis

Last Updated

16 Jan 2021

Cite this Entry

“Anaphylaxis.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/anaphylaxis. Accessed 19 Jan. 2021.

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More Definitions for anaphylaxis

anaphylaxis

noun
ana·​phy·​lax·​is | \ ˌan-ə-fə-ˈlak-səs How to pronounce anaphylaxis (audio) \
plural anaphylaxes\ -​ˌsēz How to pronounce anaphylaxis (audio) \

Medical Definition of anaphylaxis

1 : hypersensitivity (as to foreign proteins or drugs) resulting from sensitization following prior contact with the causative agent

More from Merriam-Webster on anaphylaxis

Britannica English: Translation of anaphylaxis for Arabic Speakers

Britannica.com: Encyclopedia article about anaphylaxis

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