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 9:20 PM
Updated: Apr 29, 2021 8:16 AM

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.

Indiana Coronavirus Cases

Data is updated nightly.

Cases: 751242

Reported Deaths: 13795
CountyCasesDeaths
Marion1032931788
Lake556911009
Allen41692692
St. Joseph36990565
Hamilton36588417
Elkhart29398461
Tippecanoe22901226
Vanderburgh22556400
Porter19356325
Johnson18471389
Hendricks17682317
Clark13226195
Madison13149344
Vigo12614253
LaPorte12419221
Monroe12207176
Delaware10966198
Howard10321225
Kosciusko9630121
Hancock8576146
Bartholomew8169157
Warrick7860156
Floyd7811180
Grant7242179
Wayne7162201
Boone6966103
Morgan6761141
Dubois6218118
Marshall6209116
Cass6016110
Henry5900110
Dearborn589878
Noble581488
Jackson509076
Shelby501496
Lawrence4742122
Gibson444894
Clinton442355
Harrison441875
DeKalb439885
Montgomery438090
Whitley406543
Huntington402681
Steuben400159
Miami395269
Jasper388054
Knox375991
Putnam372960
Wabash361983
Ripley347170
Adams345555
Jefferson335886
White331953
Daviess3033100
Wells295281
Decatur289992
Greene286885
Fayette284864
Posey273835
LaGrange273072
Scott270156
Clay267148
Washington246036
Randolph244783
Jennings235349
Spencer234531
Starke228058
Fountain220948
Sullivan214643
Owen211858
Fulton202942
Jay200932
Carroll193620
Orange188255
Perry187237
Rush175926
Vermillion174844
Franklin170335
Tipton166246
Parke149416
Pike138234
Blackford136232
Pulaski120647
Newton113936
Brown104243
Crawford102516
Benton101714
Martin91715
Warren84015
Switzerland8148
Union72810
Ohio57911
Unassigned0420

Ohio Coronavirus Cases

Data is updated nightly.

Cases: 1108736

Reported Deaths: 20166
CountyCasesDeaths
Franklin1287201467
Cuyahoga1157922211
Hamilton813971250
Montgomery525481043
Summit484271001
Lucas43353820
Butler39013606
Stark33332929
Lorain25672505
Warren24591303
Mahoning22370603
Lake21207388
Clermont20117253
Delaware18852136
Licking16662222
Fairfield16574204
Trumbull16548482
Medina15610271
Greene15281248
Clark14237306
Wood13292200
Portage13251215
Allen11913239
Richland11605211
Miami10849225
Wayne9141223
Columbiana9032230
Muskingum8906135
Pickaway8663122
Tuscarawas8649250
Marion8642138
Erie8056165
Ashtabula7160179
Hancock6998132
Ross6944161
Geauga6838151
Scioto6534106
Belmont6157174
Union584549
Lawrence5731102
Jefferson5678158
Huron5546122
Sandusky5442126
Darke5420129
Seneca5348128
Washington5319109
Athens523960
Auglaize502187
Mercer487385
Shelby476895
Knox4571112
Madison444266
Ashland435797
Putnam4336103
Defiance432399
Fulton432074
Crawford4037110
Brown402461
Logan387677
Preble3855105
Clinton379166
Ottawa373681
Highland359665
Williams348278
Champaign344759
Guernsey324953
Jackson318254
Perry297350
Morrow291840
Fayette285450
Hardin275265
Henry273467
Holmes2701101
Coshocton269060
Van Wert247264
Adams243256
Pike242835
Gallia240650
Wyandot234556
Hocking220563
Carroll197348
Paulding176542
Meigs148440
Monroe136344
Noble136239
Harrison114138
Morgan109624
Vinton85517
Unassigned03
Fort Wayne
Partly Cloudy
76° wxIcon
Hi: 90° Lo: 70°
Feels Like: 76°
Angola
Mostly Cloudy
° wxIcon
Hi: 87° Lo: 66°
Feels Like: °
Huntington
Cloudy
75° wxIcon
Hi: 88° Lo: 69°
Feels Like: 75°
Decatur
Partly Cloudy
76° wxIcon
Hi: 88° Lo: 68°
Feels Like: 76°
Van Wert
Partly Cloudy
78° wxIcon
Hi: 89° Lo: 68°
Feels Like: 80°
Scattered showers and storms are likely Sunday evening. Strong to severe storms are possible. Hot and humid for Father's Day.
WFFT Radar
WFFT Temperatures
WFFT National

Community Events