The Centers for Disease Control and Prevention on Friday stated it’s “very unlikely” the Pfizer omicron booster carries a threat of stroke for seniors after it launched an investigation right into a preliminary security concern detected by certainly one of its monitoring programs.

The CDC, in a press release posted to its web site Friday, stated a surveillance system referred to as the Vaccine Safety Datalink detected a potential threat for stroke in folks ages 65 and older who acquired the Pfizer booster shot concentrating on the omicron Covid variant. A CDC spokesperson stated this situation was first detected in late November.

By mid-December, the CDC concluded the priority was persisting and launched an investigation into whether or not seniors usually tend to have a stroke within the first 21 days after receiving the Pfizer booster, the spokesperson stated. An analogous preliminary sign was not detected for Moderna’s booster.

The VSD monitoring system discovered that 130 folks ages 65 and older had a stroke inside 21 days of receiving the Pfizer omicron booster amongst about 550,000 seniors who acquired the shot, the CDC spokesperson stated. No deaths have been reported. The Washington Post earlier reported the information.

No different surveillance system has detected the same security concern for the Pfizer booster up to now, in line with the CDC. Investigators haven’t discovered an elevated threat of stroke following the Pfizer booster after reviewing information from the Center for Medicare and Medicaid Services, the Department of Veterans Affairs, the Vaccine Adverse Reporting System and Pfizer’s world security database.

“Although the totality of the data currently suggests that it is very unlikely that the signal in VSD represents a true clinical risk, we believe it is important to share this information with the public, as we have in the past, when one of our safety monitoring systems detects a signal,” the CDC stated within the publish on its web site.

The monitoring programs usually detect security indicators which can be resulting from components aside from the vaccine, in line with the CDC’s Friday assertion. The company spokesperson stated investigators hope to have a clearer image and extra information within the coming weeks.

The investigation might be mentioned at an upcoming assembly of the Food and Drug Administration’s panel of impartial vaccine specialists on Jan. 26.

In a press release Friday, Pfizer stated there isn’t any proof to conclude that ischemic stroke is related to firm’s Covid vaccine. Neither Pfizer and its German companion BioNTech, nor the CDC or the FDA, have noticed such an affiliation in quite a few different monitoring programs within the U.S. and globally, firm spokesperson Kit Longley stated.

“Compared to published incidence rates of ischemic stroke in this older population, the companies to date have observed a lower number of reported ischemic strokes following the vaccination with the omicron BA.4/BA.5-adapted bivalent vaccine,” Longley stated.

The CDC has not modified its advice for the Pfizer omicron shot. Everyone ages 5 and older is eligible for the booster after finishing their major vaccine sequence. The youngest youngsters ages 6 months by 4 years outdated obtain the omicron shot because the third dose of their major sequence.