STREAMING NOW: Watch Now

Severe allergic reactions to Moderna's COVID-19 vaccine are rare, CDC says

Severe allergic reactions to Moderna's COVID-19 vaccine are rare, according to the Centers for Disease Control and Prevention.A CDC report published F...

Posted: Jan 22, 2021 7:56 PM
Updated: Jan 22, 2021 7:58 PM

Severe allergic reactions to Moderna's COVID-19 vaccine are rare, according to the Centers for Disease Control and Prevention.

A CDC report published Friday revealed just 10 people had severe allergic reactions, known as anaphylaxis, out of more than 4 million people vaccinated with a first dose of the Moderna shot as of January 10. That's a rate of 2.5 cases per million doses administered.

The CDC previously reported that, with the Pfizer/BioNTech vaccine,11.1 people out of every million vaccinated suffered the severe allergic reaction known as anaphylaxis. To compare, the rate of severe allergic reaction for the flu vaccine is 1.3 per 1 million doses.

All 10 of the severe allergic reactions to Moderna's vaccine were in women. Symptoms began quickly -- at a median of 7 1/2 minutes after people got the shot. All the patients the CDC was able to follow up with have recovered.

Nine of the patients had a documented history of allergies and more than half of those people had a previous history of anaphylaxis. Only one had a prior allergic reaction to a vaccine. The others had allergic reactions to a mix of things -- drugs, contrast agents used in some medical imaging and one person had a food allergy.

Anaphylaxis can be life threatening but people usually recover completely if promptly treated. The US Food and Drug Administration requires all sites giving COVID-19 vaccines to have trained responders and anaphylaxis treatments at hand.

The CDC has been monitoring for adverse reactions and collected 1,266 adverse event reports related to the Moderna vaccine. Among those reports, 108 involving allergic reactions were flagged for further review. Most reports of adverse events end up being unrelated to vaccination.

The CDC determined 47 of the reports were nonanaphylaxis allergic reactions and 47 were considered nonallergic reactions. Four case reports didn't have enough information to make a determination.

"An abundance of caution"

The CDC and FDA are carefully monitoring the rollout of vaccines for any adverse events.

California health officials told medical providers to pause the administration of one lot of Moderna vaccines on Sunday, after several people at a clinic in San Diego required medical attention over 24 hours after receiving doses from the lot.

Moderna said the lot contained more than 1.2 million doses shipped to 37 different states.

California's health department recommended the pause out of an "abundance of caution." After an investigation, it gave the state the all-clear to immediately resume vaccinations on Wednesday.

CDC advice

The CDC says that people who have an immediate allergic reaction to a first dose of either the Pfizer or Moderna vaccine shouldn't get the second.

Though severe reactions are relatively rare, the CDC has asked that vaccine providers be prepared. Vaccination sites must monitor people for at least 15 minutes after they receive a shot and have trained staff and supplies on hand to manage adverse reactions.

Those with a history of allergic reactions to other types of vaccines are advised to ask their doctor before getting vaccinated against COVID-19.

Doctors say the benefits of getting vaccinated against COVID-19 outweigh the risks.

Most people with allergies or a history of severe allergic reactions not related to vaccines or injectables should get be able to safely get vaccinated, the CDC says.

Those who get vaccinated can expect some side effects, like pain or swelling at the injection site, and fever, fatigue or headaches. Doctors say these are normal signs that the body is building protection against the virus.

New York Coronavirus Cases

County data is updated nightly.

Cases: 1656684

Reported Deaths: 47818
CountyCasesDeaths
Queens2129278804
Kings2121249144
Suffolk1633163095
Nassau1492512926
Bronx1452265897
Westchester1081932105
New York1044443917
Erie655711607
Richmond574051580
Monroe52759992
Rockland38797891
Orange37232720
Onondaga32489634
Dutchess22457408
Albany20931333
Oneida19763478
Niagara15351312
Broome14913336
Saratoga12002145
Schenectady10870178
Ulster10096228
Rensselaer9059132
Putnam838986
Chautauqua7341123
Chemung6445130
Oswego600889
Ontario581388
St. Lawrence556386
Steuben5516137
Cayuga538688
Jefferson481663
Sullivan477159
Herkimer4568107
Wayne448264
Cattaraugus443376
Genesee4420118
Madison385485
Clinton364526
Livingston355856
Tompkins346142
Columbia340596
Fulton335184
Montgomery3199107
Cortland317260
Allegany290681
Warren285455
Wyoming283349
Tioga281356
Greene265071
Orleans245281
Chenango244369
Otsego236043
Washington235352
Franklin209812
Lewis207330
Seneca162653
Delaware152433
Essex134726
Schoharie121512
Yates101526
Schuyler86812
Hamilton2852
Unassigned197131
Out of NY0192
Rome
Cloudy
30° wxIcon
Hi: 24° Lo: 21°
Feels Like: 22°
Binghamton
Cloudy
30° wxIcon
Hi: 28° Lo: 22°
Feels Like: 20°
Rome
Cloudy
30° wxIcon
Hi: 26° Lo: 22°
Feels Like: 22°
Rome
Cloudy
30° wxIcon
Hi: 18° Lo: 19°
Feels Like: 22°
WKTV Radar
WKTV Temperatures
WKTV Severe Weather
Submit your Mutt Madness Picture through March 10th
March into Beautiful Skin Giveaway
2021 Golfer's Paradise Card - 21 Courses for only $99.99
Saluting Those Who Are Proud 2 Serve