单词	microgram
释义	microgram noun mi·​cro·​gram ˈmī-krə-ˌgram  : one millionth of a gram see Metric System Table Example Sentences Recent Examples on the Web This updated formulation will combine the original vaccine with one that targets Omicron sublineages BA.4 and BA.5, and would be administered as a 30 microgram dose. Amanda Sealy, CNN, 22 Aug. 2022 For every two microgram increase in blood lead levels, a child loses approximately one IQ point. Michael J. Coren, Quartz, 16 June 2022 Enlarge / Managing a microgram might be a case where blockchain is actually useful. John Timmer, Ars Technica, 5 June 2022 The two 25 microgram shots, given four weeks apart, generated immune responses similar to what was seen in adults 18 to 25 years old after two doses. Helen Branswell, STAT, 24 May 2022 For the Pfizer-BioNTech vaccine, adults receive two 30 microgram doses three weeks apart followed by a booster at least five months later. Karen Weintraub, USA TODAY, 15 June 2022 Pfizer had started its trial with two 10 microgram dose for children, which the company found wasn't effective enough for certain age groups and expects results from a third dose in the weeks ahead. Mary Kekatos, ABC News, 23 Mar. 2022 But in the antibody realm, two doses of Pfizer’s three-microgram dose, which is still in trials, fell short in the 2-to-4-year-old group, prompting the company to add a third shot for all kids younger than 5. Katherine J. Wu, The Atlantic, 29 Mar. 2022 The second booster of the Pfizer-BioNTech vaccine would use the same, 30 microgram dose as the first three administered. Stephanie Armour, WSJ, 29 Mar. 2022 See More Word History Etymology International Scientific Vocabulary First Known Use circa 1890, in the meaning defined above Medical Definition microgram noun mi·​cro·​gram ˈmī-krə-ˌgram  1 : one millionth of a gram 2 : micrograph sense 1
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