Many millions have been vaccinated against the coronavirus; 396 were later hospitalized with Covid-19

About 5,800 people who have been vaccinated against coronavirus have become infected anyway, the US Centers for Disease Control and Prevention tells CNN.

Posted: Apr 15, 2021 12:16 PM

(CNN) -- About 5,800 people who have been vaccinated against coronavirus have become infected anyway, the US Centers for Disease Control and Prevention tells CNN.

Some became seriously ill and 74 people died, the CDC said. It said 396 -- 7% -- of those who got infected after they were vaccinated required hospitalization.

This is the CDC's first public accounting of breakthrough cases, and the agency is searching for patterns based on patient age and gender, location, type of vaccine, variants and other factors.

"So far, about 5,800 breakthrough cases have been reported to CDC. To date, no unexpected patterns have been identified in case demographics or vaccine characteristics," the CDC told CNN via email.

About 77 million people in the US are fully vaccinated against coronavirus, according to a CNN analysis of CDC data. The CDC's reports on breakthrough cases will lag day-to-day reports of vaccines given, so may not reflect the most current events.

Breakthrough cases are expected. The vaccines are not 100% effective in preventing infections and as 10s of millions of people are vaccinated, more and more such cases will be reported.

Pfizer/BioNTech's vaccine was 95% effective in preventing symptomatic disease in clinical trials, and earlier this month the companies said real-life data in the US shows the vaccine is more than 91% effective against disease with any symptoms for six months. Moderna's vaccine was 94% effective in preventing symptomatic illness in trials, and 90% effective in real life use. Johnson & Johnson's vaccine was 66% overall globally in trials, and 72% effective at preventing disease in the US.

CDC will be looking for clues about who is most prone to become infected despite having been vaccinated.

"Vaccine breakthrough infections were reported among all people of all ages eligible for vaccination. However, a little over 40% of the infections were in people 60 or more years of age," the CDC said.

Most, 65%, were female and 29% of the so-called breakthrough infections were asymptomatic. "CDC is monitoring reported cases for clustering by patient demographics, geographic location, time since vaccination, vaccine type or lot number, and SARS-CoV-2 lineage," the CDC said.

Plus, samples from cases will be tested to see how many are caused by variants and if so, which ones.

"CDC has developed a national COVID-19 vaccine breakthrough database where state health department investigators can currently enter, store, and manage data for cases in their jurisdiction," the CDC said.

"Vaccine breakthrough infections make up a small percentage of people who are fully vaccinated. CDC recommends that all eligible people get a COVID-19 vaccine as soon as one is available to them. CDC also continues to recommend people who have been fully vaccinated should keep taking precautions in public places, like wearing a mask, staying at least six feet apart from others, avoiding crowds and poorly ventilated spaces, and washing their hands often."

The-CNN-Wire
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Cases: 1354869

Reported Deaths: 24577
CountyCasesDeaths
Cook54245010056
DuPage900321276
Will75056989
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Kane58044770
Winnebago32927472
Madison30392518
McHenry28413285
St. Clair27762512
Peoria22956300
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Rock Island14861308
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Macon10698198
DeKalb9812119
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Adams8407123
Williamson7397129
Whiteside7126171
Boone666472
Ogle607681
Grundy585275
Clinton575190
Coles566594
Knox5525141
Jackson500364
Henry492963
Livingston480185
Stephenson473381
Effingham472172
Woodford471776
Macoupin467581
Marion4459115
Franklin443774
Monroe435593
Jefferson4270120
Lee414152
Randolph412684
Fulton389555
Morgan386981
Logan385057
Montgomery370873
Bureau369682
Christian364473
Fayette316955
Perry315860
Iroquois299366
McDonough281947
Jersey268849
Douglas258335
Saline256154
Lawrence240425
Shelby229037
Union225240
Crawford211426
Bond203724
Cass198425
Jo Daviess180524
Warren179246
Pike178652
Clark178533
Ford177446
Wayne176852
Hancock175231
Carroll174536
Richland174140
White169326
Edgar168539
Washington163825
Moultrie160426
De Witt149824
Mason149745
Clay148043
Piatt147914
Mercer145633
Greene143233
Johnson142715
Wabash134612
Massac133440
Cumberland129119
Menard122912
Jasper115018
Marshall105818
Hamilton83115
Schuyler7435
Brown7036
Pulaski6837
Stark63423
Edwards56812
Henderson52514
Calhoun5162
Putnam4813
Scott4781
Alexander46711
Gallatin4584
Hardin38412
Pope3174
Out of IL10
Unassigned02354

Indiana Coronavirus Cases

(Widget updates once daily at 8 p.m. ET)

Cases: 729716

Reported Deaths: 13418
CountyCasesDeaths
Marion998331740
Lake53638968
Allen40585676
St. Joseph35651550
Hamilton35569408
Elkhart28514442
Tippecanoe22386219
Vanderburgh22300397
Porter18725308
Johnson17933379
Hendricks17209315
Clark12951191
Madison12649339
Vigo12440246
LaPorte11890211
Monroe11883170
Delaware10676186
Howard9908216
Kosciusko9401117
Hancock8275141
Bartholomew8061155
Warrick7778155
Floyd7657178
Wayne7042199
Grant7041174
Boone6690101
Morgan6563139
Dubois6153117
Marshall6039111
Dearborn580478
Cass5803105
Henry5713103
Noble560383
Jackson501673
Shelby490796
Lawrence4531120
Harrison435472
Gibson435092
DeKalb427885
Clinton427153
Montgomery423888
Whitley395639
Huntington390680
Steuben387057
Miami381566
Knox371990
Jasper364947
Putnam359960
Wabash353679
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Ripley339570
Jefferson330681
White313854
Daviess296799
Wells291481
Decatur284892
Fayette280462
Greene278585
Posey271433
LaGrange266170
Scott265653
Clay259747
Washington240632
Randolph240281
Spencer232131
Jennings229949
Starke216353
Fountain212246
Sullivan211542
Owen199256
Fulton195440
Jay194730
Carroll188520
Orange182954
Perry182837
Rush173125
Vermillion169243
Franklin168035
Tipton162845
Parke146216
Blackford134732
Pike133834
Pulaski116745
Newton107734
Brown102041
Crawford99714
Benton98614
Martin88615
Warren82015
Switzerland7898
Union71010
Ohio56811
Unassigned0415