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Pfizer and Moderna vaccines reduce Covid-19 hospitalization risk by 94% among older adults, CDC study says

The Pfizer/BioNTech and Moderna Covid-19 vaccines were found in the real world to be 94% effective against Covid-19 hospitalization among fully vaccinated ad...

Posted: Apr 28, 2021 5:11 PM

The Pfizer/BioNTech and Moderna Covid-19 vaccines were found in the real world to be 94% effective against Covid-19 hospitalization among fully vaccinated adults ages 65 and older in the United States, according to a new US Centers for Disease Control and Prevention study.

The study also found that the vaccines were 64% effective among those older adults who were partially vaccinated, meaning they had only received one dose of vaccine so far.

These findings are consistent with the vaccines' clinical trial results, which showed an efficacy of about 94% to 95%, researchers from the CDC and several other institutions noted.

"These data suggest that continuing to rapidly vaccinate U.S. adults against COVID-19 will likely have a marked impact on COVID-19 hospitalization and might lead to commensurate reductions in post-COVID conditions and deaths," the researchers wrote in their study.

The study included data on 417 adults ages 65 and older with Covid-19-like symptoms who were admitted to 24 hospitals in 14 states between January 1 and March 26. Among those patients, 187 tested positive for the coronavirus that causes Covid-19 and 230 tested negative.

The researchers found that among those who tested positive, most were unvaccinated. Only 18 of the patients, or 10%, were partially vaccinated with a first dose of the Pfizer or Moderna vaccines and just one person -- representing 0.5% -- was fully vaccinated.

Among the 230 adults who tested negative, 44 of them, or 19%, were partially vaccinated and 18, or 8%, were fully vaccinated, the data showed.

Overall, "these findings are encouraging and welcome news for the two-thirds of people aged 65 and up who are already fully vaccinated," CDC Director Dr. Rochelle Walensky said in a news release on Wednesday.

"COVID-19 vaccines are highly effective and these real-world findings confirm the benefits seen in clinical trials, preventing hospitalizations among those most vulnerable," Walensky said. "The results are promising for our communities and hospitals. As our vaccination efforts continue to expand, COVID-19 patients will not overwhelm health care systems -- leaving hospital staff, beds, and services available for people who need them for other medical conditions."

The new study included data from California, Colorado, Maryland, Massachusetts, Michigan, Minnesota, New York, North Carolina, Ohio, Oregon, Pennsylvania, Tennessee, Texas and Utah. More research is needed to determine whether similar findings would emerge across more states to represent the entire US population.

Similar findings have been found previously.

A separate study, published last week in the New England Journal of Medicine, found that among 417 employees at Rockefeller University in New York who were fully vaccinated with either the Pfizer or Moderna shots, only two of them -- also about 0.5% -- tested positive for Covid-19 later.

In March, pharmaceutical companies Pfizer and BioNTech announced that real-world evidence from the Israel Ministry of Health show that there have been "dramatically" fewer Covid-19 cases and deaths among people in Israel who have been fully vaccinated. That analysis found that the vaccine effectiveness was 94% in preventing asymptomatic Covid-19, where infections show no symptoms.

Mississippi Coronavirus Cases

Data is updated nightly.

Cases: 501097

Reported Deaths: 9990
CountyCasesDeaths
Harrison34338538
DeSoto32117403
Hinds31939628
Jackson24494382
Rankin21995390
Lee15543235
Madison14581280
Jones13851242
Forrest13453251
Lauderdale11991317
Lowndes11050188
Lamar10521135
Pearl River9533237
Lafayette8550140
Hancock7732127
Washington7438158
Oktibbeha7146131
Monroe6777177
Warren6694176
Pontotoc6664102
Neshoba6637206
Panola6531131
Marshall6467134
Bolivar6317148
Union602894
Pike5820152
Alcorn5669101
Lincoln5436135
George496879
Scott472898
Tippah469281
Prentiss467281
Leflore4658144
Itawamba4636105
Tate4588111
Adams4587119
Copiah448592
Simpson4446116
Yazoo444187
Wayne439772
Covington428894
Sunflower4239105
Marion4226108
Coahoma4160105
Leake408288
Newton381779
Grenada3707108
Stone360364
Tishomingo359792
Attala331589
Jasper329965
Winston314291
Clay308076
Chickasaw300367
Clarke292494
Calhoun279446
Holmes267987
Smith264050
Yalobusha234047
Tallahatchie228051
Greene219348
Walthall218763
Lawrence212940
Perry205556
Amite205156
Webster202946
Noxubee186740
Montgomery179656
Jefferson Davis171743
Carroll169138
Tunica159839
Benton148838
Kemper141941
Choctaw133426
Claiborne132737
Humphreys129538
Franklin120228
Quitman106428
Wilkinson105139
Jefferson94534
Sharkey64120
Issaquena1937
Unassigned00

Alabama Coronavirus Cases

Cases: 820011

Reported Deaths: 15407
CountyCasesDeaths
Jefferson1148361924
Mobile726091339
Madison52337697
Shelby37622350
Baldwin37258552
Tuscaloosa35117612
Montgomery34116740
Lee23536246
Calhoun22232488
Morgan20952378
Etowah19834500
Marshall18372304
Houston17390412
St. Clair16064339
Cullman15454293
Limestone15349199
Elmore15264286
Lauderdale14314295
Talladega13842283
DeKalb12662261
Walker11206370
Blount10197176
Autauga10047148
Jackson9874184
Coffee9211191
Dale8900185
Colbert8871201
Tallapoosa7089198
Escambia6775134
Covington6713183
Chilton6645162
Russell637059
Franklin5962105
Chambers5610142
Marion5007127
Dallas4975200
Pike4796106
Clarke475784
Geneva4574127
Winston4519103
Lawrence4324117
Bibb425286
Barbour357876
Marengo338390
Monroe331564
Randolph329764
Butler326496
Pickens316384
Henry312766
Hale311688
Cherokee302860
Fayette294180
Washington251651
Cleburne247760
Crenshaw245275
Clay243368
Macon234863
Lamar224447
Conecuh186253
Coosa180240
Lowndes175364
Wilcox168939
Bullock151744
Perry138840
Sumter133238
Greene126744
Choctaw88527
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Clear cool and dry to begin your weekend, but both afternoons should be a little bit above what we expect for this time of year temperature wise. Rain chances begin to return late Sunday night, with at least two chances for storms over the next week, summer could be strong.
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