FRIDAY, March 12, 2021 -- Individuals with preexisting immunity receiving an mRNA vaccine for COVID-19 have higher antibody titers after one dose than those without preexisting immunity, according to a letter to the editor published online March 10 in the New England Journal of Medicine.
Florian Krammer, Ph.D., from the Icahn School of Medicine at Mount Sinai in New York City, and colleagues examined antibody responses in 110 participants with or without documented preexisting severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2): 67 were seronegative and 43 were seropositive.
The researchers found that most seronegative participants had variable and relatively low SARS-CoV-2 immunoglobulin G responses within nine to 12 days after vaccination (median area under the curve [AUC]: 1; 1; 1; 439; 1,016; 1,037; 1,293; and 3,316 before vaccination; at zero to four days; five to nine days; nine to 12 days; 13 to 16 days; 17 to 20 days; 21 to 27 days; and after the second dose, respectively). Seropositive participants rapidly developed uniform, high antibody titers within days after vaccination (median AUC: 90; 133; 14,208; 20,783; 25,927; 11,755; 19,534; and 22,509 before vaccination; at zero to four days; five to nine days; nine to 12 days; 13 to 16 days; 17 to 20 days; 21 to 27 days; and after the second dose, respectively). Vaccinees with preexisting immunity had antibody titers that were 10 to 45 times as high as those of vaccinees without preexisting immunity at the same time points after the first vaccine dose.
"These findings suggest that a single dose of vaccine elicits a very rapid immune response in individuals who have tested positive for COVID-19," Krammer said in a statement.
![(3S)-3-[4-[7-[[(1,1-Dimethylethyl)amino]carbonyl]-2H-indazol-2-yl]phenyl]-1-piperidinecarboxylic acid 1,1-dimethylethyl ester](/data/attachment/201705/26/3446bd2b841689a5afc36447418dc476.png "(3S)-3-[4-[7-[[(1,1-Dimethylethyl)amino]carbonyl]-2H-indazol-2-yl]phenyl]-1-piperidinecarboxylic acid 1,1-dimethylethyl ester")
![N-(1,1-Dimethylethyl)-2-[4-(3S)-3-piperidinylphenyl]-2H-indazole-7-carboxamide](/data/attachment/201705/26/da41ae70b523a458db70333bd1059362.png "N-(1,1-Dimethylethyl)-2-[4-(3S)-3-piperidinylphenyl]-2H-indazole-7-carboxamide")
![2-{4-[(3S)-piperidin-3-yl]phenyl}-2H-indazole-7-carboxamide](/data/attachment/201705/26/d3114dd994f3dda3142cba7d326bcede.jpg "2-{4-[(3S)-piperidin-3-yl]phenyl}-2H-indazole-7-carboxamide")
![9-ethyl-8-iodo-6,6-diMethyl-11-oxo-6,11-dihydro-5H-benzo[b]carbazole-3-carbonitrile](/data/attachment/201705/28/e48e5d316800efe6192ebfdeec6cf28c.gif "9-ethyl-8-iodo-6,6-diMethyl-11-oxo-6,11-dihydro-5H-benzo[b]carbazole-3-carbonitrile")
![9-broMo-8-hydroxy-6,6-diMethyl-11-oxo-6,11-dihydro-5H-benzo[b]carbazole-3-carbonitrile](/data/attachment/201705/28/fe98529212eb834b17a38f13138a35bf.png "9-broMo-8-hydroxy-6,6-diMethyl-11-oxo-6,11-dihydro-5H-benzo[b]carbazole-3-carbonitrile")
![9-ethyl-6,6-diMethyl-8-(4-Morpholinopiperidin-1-yl)-11-oxo-5a,6,11,11a-tetrahydro-5H-benzo[b]carbazole-3-carbonitrile hydrochloride](/data/attachment/201705/28/36e5363f0c9f92378b75195743e2abb2.jpg "9-ethyl-6,6-diMethyl-8-(4-Morpholinopiperidin-1-yl)-11-oxo-5a,6,11,11a-tetrahydro-5H-benzo[b]carbazole-3-carbonitrile hydrochloride")
![2-Methylpyrazolo[1,5-a]pyrimidine-6-carboxamide](/data/attachment/201706/03/2e19d959128718d26901f9909d7b9342.jpg "2-Methylpyrazolo[1,5-a]pyrimidine-6-carboxamide")
![11-(1-Methylpiperidin-4-ylidene)-6,11-dihydro-5H-benzo[d]iMidazo[1,2-a]azepine](/data/attachment/201706/03/1549d9affee63ead337049001f25d9fa.jpg "11-(1-Methylpiperidin-4-ylidene)-6,11-dihydro-5H-benzo[d]iMidazo[1,2-a]azepine")
![tert-butyl 5-tosyl-5H-pyrrolo[2,3-b]pyrazin-2-ylcarbamate](/data/attachment/201706/03/8a3c0fcdeb9ed744fc854cf248d4d53e.jpg "tert-butyl 5-tosyl-5H-pyrrolo[2,3-b]pyrazin-2-ylcarbamate")
![2-Furanpropanol, 5-[2-[(2S,4R,6R)-6-[[(2S,3S,4R,5R)-5-[(2S)-2,3-bis[[(1,1-dimethylethyl)dimethylsilyl]oxy]propyl]tetrahydro-4-methoxy-3-[(phenylsulfonyl) methyl]-2-furanyl]methyl]tetrahydro-4-methyl-5-methylene-2H-pyran-2-yl]ethyl]tetrahydro-4-methylene-,](/data/attachment/201706/03/3575f40dcc389832ca73cc99972a645b.gif.thumb.jpg "2-Furanpropanol, 5-[2-[(2S,4R,6R)-6-[[(2S,3S,4R,5R)-5-[(2S)-2,3-bis[[(1,1-dimethylethyl)dimethylsilyl]oxy]propyl]tetrahydro-4-methoxy-3-[(phenylsulfonyl) methyl]-2-furanyl]methyl]tetrahydro-4-methyl-5-methylene-2H-pyran-2-yl]ethyl]tetrahydro-4-methylene-,")
![6-[(6-Bromo-1H-[1,2,3]triazolo[4,5-b]pyrazin-1-yl)methyl]-7-fluoroquinoline](/data/attachment/201706/07/27ae4307b53f4294590fb8f914894490.jpg "6-[(6-Bromo-1H-[1,2,3]triazolo[4,5-b]pyrazin-1-yl)methyl]-7-fluoroquinoline")
![7-Trifluoromethyl-imidazo[1,2-a]pyridine](/data/attachment/201706/07/24ba6100528abe0753ad9e82ef8dc810.gif "7-Trifluoromethyl-imidazo[1,2-a]pyridine")
![2-AMino-4,5,6,7-tetrahydro-benzo[b]thiophene-3-carboxylic acid tert-butyl ester](/data/attachment/201706/07/22aadd4c55094254a681014935f56827.jpg "2-AMino-4,5,6,7-tetrahydro-benzo[b]thiophene-3-carboxylic acid tert-butyl ester")
![Benzenemethanol, a-[(1S)-1-aminoethyl]-4-hydroxy-,(aR)](/data/attachment/201706/07/c4adcbada0ef372ae46cbaed643dd18e.jpg "Benzenemethanol, a-[(1S)-1-aminoethyl]-4-hydroxy-,(aR)")
![2(1H)-Quinolinone,5-[(1R)-2-amino-1-[[(1,1-dimethylethyl)dimethylsilyl]oxy]ethyl]-8-hydroxy](/data/attachment/201706/07/e0e9b5769a45af836d70be4140043125.gif.thumb.jpg "2(1H)-Quinolinone,5-[(1R)-2-amino-1-[[(1,1-dimethylethyl)dimethylsilyl]oxy]ethyl]-8-hydroxy")
![2-{[3-(4-Fluorophenyl)-4-oxo-3,4,6,7-tetrahydrothieno[3,2-d]pyrim idin-2-yl]sulfanyl}-N-(6-methyl-1,3-benzothiazol-2-yl)acetamide](/data/attachment/201706/07/5754ee36bdfbf4148f45632422f563b9.jpg "2-{[3-(4-Fluorophenyl)-4-oxo-3,4,6,7-tetrahydrothieno[3,2-d]pyrim idin-2-yl]sulfanyl}-N-(6-methyl-1,3-benzothiazol-2-yl)acetamide")
![2-((3-(2-methoxyphenyl)-4-oxo-3,4,6,7-tetrahydrothieno[3,2-d]pyrimidin-2-yl)thio)-N-(6-methylbenzo[d]thiazol-2-yl)acetamide](/data/attachment/201706/08/47a8b3c98aef0b9ba378c4b7c6cef435.jpg "2-((3-(2-methoxyphenyl)-4-oxo-3,4,6,7-tetrahydrothieno[3,2-d]pyrimidin-2-yl)thio)-N-(6-methylbenzo[d]thiazol-2-yl)acetamide")
![N-(6-Methyl-2-benzothiazolyl)-2-[(3,4,6,7-tetrahydro-4-oxo-3-phenylthieno[3,2-d]pyrimidin-2-yl)thio]-acetamide](/data/attachment/201706/08/beda6f8f4655aa74d3646cfc7621fb20.jpg "N-(6-Methyl-2-benzothiazolyl)-2-[(3,4,6,7-tetrahydro-4-oxo-3-phenylthieno[3,2-d]pyrimidin-2-yl)thio]-acetamide")
![4(3H)-Quinazolinone,7-bromo-6-chloro-3-[3-(3-hydroxy-2-piperidinyl)-2-oxopropyl]](/data/attachment/201706/09/b600ffca12695094db2c5f6045cb6685.jpg "4(3H)-Quinazolinone,7-bromo-6-chloro-3-[3-(3-hydroxy-2-piperidinyl)-2-oxopropyl]")
![9-OXO-1,2,3,9-TETRAHYDRO-PYRROLO[2,1-B]QUINAZOLINE-6-CARBOXYLIC ACID](/data/attachment/201706/09/d6b395bbfb23e628be7d536d9cc2b512.gif "9-OXO-1,2,3,9-TETRAHYDRO-PYRROLO[2,1-B]QUINAZOLINE-6-CARBOXYLIC ACID")
![2-Butenoic acid, 2-hydroxy-4-[5-(1-Methylethyl)-2,4-bis(phenylMethoxy)phenyl]-4-oxo-, ethyl ester](/data/attachment/201706/09/11c6e17ba89840528c5461ae5350df33.gif "2-Butenoic acid, 2-hydroxy-4-[5-(1-Methylethyl)-2,4-bis(phenylMethoxy)phenyl]-4-oxo-, ethyl ester")
methanone](/data/attachment/201706/09/ca947be16560699c92609cd96b352c02.png.thumb.jpg "[4-amino-2-(ethylsulfanyl)pyrimidin-5-yl](2,3-difluoro-6-methoxyphenyl)methanone")
![Benzenesulfonamide, 2-[(5-bromo-2-chloro-4-pyrimidinyl)amino]-N-methyl](/data/attachment/201706/10/ce0d621896c03bdb67e3b184103e84ff.png.thumb.jpg "Benzenesulfonamide, 2-[(5-bromo-2-chloro-4-pyrimidinyl)amino]-N-methyl")
![1,2,3,4-Tetrahydro-benzo[b]azepin-5-one 1127-74-8](/data/attachment/201901/28/b183df1e648eca4396ad0d319a1254bc.jpg "1,2,3,4-Tetrahydro-benzo[b]azepin-5-one 1127-74-8")
1127-74-8,1,2,3,4-Tetrahydro-benzo[b]azepin-5-one
Read More
4038-14-6,(3,4-dimethoxyphenyl)-phenylmethanone
Read More
![3-Ethynylimidazo[1,2-a]pyridine 943320-53-4](/data/attachment/201901/28/d6294d1dabcee85ee04792b0c0e255c0.jpg "3-Ethynylimidazo[1,2-a]pyridine 943320-53-4")
![2-[3-(trifluoromethyl)phenyl]acetonitrile 2338-76-3](/data/attachment/201901/29/22b99245cb0bbcd2d86f238725d9fb9d.jpg "2-[3-(trifluoromethyl)phenyl]acetonitrile 2338-76-3")
2338-76-3,2-[3-(trifluoromethyl)phenyl]acetonitrile
Read More![2-[3-(trifluoromethyl)phenyl]acetic acid 351-35-9](/data/attachment/201901/29/7dbc74a276a4c124b9460222442fd80f.jpg "2-[3-(trifluoromethyl)phenyl]acetic acid 351-35-9")
351-35-9,2-[3-(trifluoromethyl)phenyl]acetic acid
Read More
2997-92-4,2,2'-Azobis(2-methylpropionamidine) dihydrochloride
Read More
95585-78-7,L-Phenylalanine, 1-methylethyl ester, hydrochloride
Read More
20324-87-2,Disodium 7,7'-(carbonyldiimino)bis(4-hydroxynaphthalene-2-sulphonate)
Read More
182498-32-4,1-(2-bromophenyl)-3-(2-hydroxy-4-nitrophenyl)urea
Read More
![(4-nitrophenyl) 4-[bis(1,3-benzodioxol-5-yl)-hydroxymethyl]piperidine-1-carboxylate 1101854-58-3](/data/attachment/201903/22/9e81dae7e0bdec56ac6052b1872d9626.jpg "(4-nitrophenyl) 4-[bis(1,3-benzodioxol-5-yl)-hydroxymethyl]piperidine-1-carboxylate 1101854-58-3")
1101854-58-3,(4-nitrophenyl) 4-[bis(1,3-benzodioxol-5-yl)-hydroxymethyl]piperidine-1-carboxylate
Read More
170565-89-6,N,N-dimethyl-2-oxo-1,3-dihydroindole-5-sulfonamide
Read More![5,6,11,12-tetrahydrodibenzo[1,2-b:1,2-g][8]annulene 1460-59-9](/data/attachment/201903/23/50930df6d55412ac8f4da0724b497aaf.jpg "5,6,11,12-tetrahydrodibenzo[1,2-b:1,2-g][8]annulene 1460-59-9")
1460-59-9,5,6,11,12-tetrahydrodibenzo[1,2-b:1',2'-g][8]annulene
Read More
![2-chloro-6-[(2R)-2-hydroxy-3-[(2-methyl-1-naphthalen-2-ylpropan-2-yl)amino]propoxy]benzonitrile 284035-33-2](/data/attachment/201903/23/7e63bafe6c4b7e146e00c57dfca99672.jpg "2-chloro-6-[(2R)-2-hydroxy-3-[(2-methyl-1-naphthalen-2-ylpropan-2-yl)amino]propoxy]benzonitrile 284035-33-2")
284035-33-2,2-chloro-6-[(2R)-2-hydroxy-3-[(2-methyl-1-naphthalen-2-ylpropan-2-yl)amino]propoxy]benzonitrile
Read More
![N-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)-2-methyl-1-oxo-1,2-dihydroisoquinoline-4-carboxamide 440662-09-9](/data/attachment/201903/23/e26baac537719657acd9f1f55568401d.jpg "N-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)-2-methyl-1-oxo-1,2-dihydroisoquinoline-4-carboxamide 440662-09-9")
440662-09-9,N-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)-2-methyl-1-oxo-1,2-dihydroisoquinoline-4-carboxamide
Read More![N-[2-[2-(4-chlorophenyl)-1,3-thiazol-4-yl]ethyl]butanamide 932986-18-0](/data/attachment/201903/23/7d2bbd100c8322ae16168937617e1bb2.jpg "N-[2-[2-(4-chlorophenyl)-1,3-thiazol-4-yl]ethyl]butanamide 932986-18-0")
932986-18-0,N-[2-[2-(4-chlorophenyl)-1,3-thiazol-4-yl]ethyl]butanamide
Read More
1234015-52-1,5-(5-(2-(3-aminopropoxy)-6-methoxyphenyl)-1H-pyrazol-3-ylamino)pyrazine-2-carbonitrile
Read More![3-Methyl-3-[(1E)-2-phenylethenyl]-3,2:5,2:5,3-quaterpyridine 1651890-44-6](/data/attachment/201903/23/07bf6fd99e81033df0c83039ccdde036.jpg "3-Methyl-3-[(1E)-2-phenylethenyl]-3,2:5,2:5,3-quaterpyridine 1651890-44-6")
1651890-44-6,3'-Methyl-3''-[(1E)-2-phenylethenyl]-3,2':5',2'':5'',3'''-quaterpyridine
Read More![3-[4-(Dimethylamino)-3-biphenylyl]-1,1-dimethylure 1469924-27-3](/data/attachment/201903/23/f69ad7342d131146640e0c88f73e9a25.jpg "3-[4-(Dimethylamino)-3-biphenylyl]-1,1-dimethylure 1469924-27-3")
1469924-27-3,3-[4'-(Dimethylamino)-3-biphenylyl]-1,1-dimethylure
Read More
3897-94-7,8-Methoxy-N,N-dipropyl-1,2,3,4-tetrahydro-2-naphthalenamine
Read More![4-{4-[(4-{[3-(Acryloylamino)phenyl]amino}-5-fluoro-2-pyrimidinyl) amino]phenoxy}-N-methyl-2-pyridinecarboxamide 1202759-32-7](/data/attachment/201903/23/bb4110673d0676f81860d708092eb660.jpg "4-{4-[(4-{[3-(Acryloylamino)phenyl]amino}-5-fluoro-2-pyrimidinyl) amino]phenoxy}-N-methyl-2-pyridinecarboxamide 1202759-32-7")
1202759-32-7,4-{4-[(4-{[3-(Acryloylamino)phenyl]amino}-5-fluoro-2-pyrimidinyl) amino]phenoxy}-N-methyl-2-pyridinecarboxamide
Read More
71145-03-4,1,4-Dihydro-2,6-dimethyl-3-nitro-4-(2-trifluoromethylphenyl)-pyridine-5-carboxylic acid methyl ester
Read More![2-[[3-[[2-(dimethylamino)phenyl]methyl]-2-pyridin-4-yl-1,3-diazinan-1-yl]methyl]-N,N-dimethylaniline 500579-04-4](/data/attachment/201903/23/b396a2326dddb511aae497b01fbd4c77.jpg "2-[[3-[[2-(dimethylamino)phenyl]methyl]-2-pyridin-4-yl-1,3-diazinan-1-yl]methyl]-N,N-dimethylaniline 500579-04-4")
500579-04-4,2-[[3-[[2-(dimethylamino)phenyl]methyl]-2-pyridin-4-yl-1,3-diazinan-1-yl]methyl]-N,N-dimethylaniline
Read More
1443437-74-8,N-(4-chlorophenyl)-1-(3-(furan-2-yl)benzoyl)piperidine-3-carboxamide
Read More
1125-29-7 1,3,5-Trimethyl-1H-pyrazole-4-carboxylic acid
Read More
![[2-(aminocarbonyl)phenyl]acetic acid 23362-56-3](/data/attachment/202211/10/9756043560e11c17cf958f3ed54d541a.png.thumb.jpg "[2-(aminocarbonyl)phenyl]acetic acid 23362-56-3")
23362-56-3 [2-(aminocarbonyl)phenyl]acetic acid
Read More
103788-65-4 2-(5-Methyl-2-phenyl-1,3-oxazol-4-yl)ethan-1-ol
Read More
120503-69-7 2-Amino-6-cyclopropylamino-9H-purine
Read More
Deutsche
Español
français
italiano
português
日本語
한국어
العربية
русский
bahasa Indonesia
Tiếng Việt
Send Email
Skype
3391543003
+86 15195055733
