Investment

COVID vaccines: WHO looking at rare reports of hearing loss

The World Health Organization (WHO) is looking at rare reports of people getting ear infections and experiencing hearing loss after receiving the COVID-19 vaccination, according to a newsletter report published by the health agency.

Tinnitus and hearing loss, including sudden instances, have been reported in VigiBase, the WHO database for suspected adverse drug reactions. A total of 37,529 cases from 86 countries were flagged as signals in Nov. 18, 2021, according to WHO.

A “signal” is defined by the WHO as reported information on a possible cause of the association between a bad event and a drug, whose connection is unknown or previously not well documented. The agency stressed that the signals were uncertain and also preliminary.

Nearly 11.3 billion doses of a single COVID-19 vaccine have been given worldwide, according to vaccine monitor CTVNews.ca, making these reported instances very rare.

Of the 37,529 cases, 31,644 involved tinnitus, while 1,290 involved sudden hearing loss. Most of the review in the report, however, focused on the 164 cases of hearing loss and 367 cases of tinnitus cases reported prior to Feb. 22, 2021.

For those first cases, the WHO said alternative causes were not identified for most patients, although some may have contributing morbidities such as allergies, high blood pressure, previous hearing loss, and other auto-immune-related disorders.

“The most commonly reported symptoms are tinnitus, followed by headache, dizziness and nausea, and many patients experience rapid recovery, while some require steroid treatment. A realistic mechanism of action involving the vestibulocochlear nerve has been suggested, ”the report said.

“Awareness of this possible link may help health care professionals and those who have been vaccinated to monitor symptoms and seek care, if appropriate. Because there is still limited data in the literature providing evidence for that link this, further monitoring is needed. “

Patients, mostly young and healthy, reported experiencing hearing issues within minutes to hours after receiving their vaccine, the WHO report said. Many of the symptoms have been described as tinnitus-like, or muffled-hearing sensations, and some report headaches, vertigo, and nausea. In some cases, symptoms involving hearing loss have developed into partial or complete hearing loss, which is documented in some cases by an audiogram. Treatment with high -dose steroids is given in many cases.

“Half of the cases stated that the patient was recovering or recovering from their hearing loss, while no (or limited) additional follow-up information was recorded for other cases. Evidence for long-term loss of hearing is therefore incomplete, ”the report said as referring to the earliest cases identified in February, 2021.

The first cases showed that hearing loss and tinnitus were more commonly reported by women than men. More than half of the reports identified before February, 2021 were categorized as not serious, while 43 percent were considered serious.

The WHO also noted that, in some instances, other side-effects have been recorded including facial paralysis or a feeling of numbness in the face, suggesting that other cranial nerves may be involved in the issue.

“A potential mechanism for hearing loss associated with the COVID-19 vaccine could be an autoimmune process involving molecular mimicry associated with the vaccine antigen, or bystander activation of autoreactive T-cells that may be related to the vestibulocochlear nerve, “the report said. The vestibular nerve is tied to balance while the cochlear nerve is involved in hearing.

Hearing loss is not referred to in product labeling for most COVID-19 vaccines, but both Pfizer-BioNtech and Moderna have listed acute peripheral facial paralysis as a rare adverse reaction. Tinnitus is listed as an adverse reaction only for the Janssen COVID-19 vaccine.

A limited analysis of data from the November 2021 update indicated that hearing diseases are not limited to one particular COVID-19 vaccine, with cases found involving most vaccines, the report said.

jQuery (document) .ready (function () {window.fbAsyncInit = function () {FB.init ({appId: ‘404047912964744’, // App ID channelUrl: ‘https://static.ctvnews.ca/bellmedia/common /channel.html ‘, // Channel File status: true, // check login status cookie: true, // enable cookies to allow server to access session xfbml: true // parse XFBML}); FB. Event.subscribe (“edge.create”, function (response) {Tracking.trackSocial (‘facebook_like_btn_click’);});

// BEGIN: Facebook clicks on unlike button FB.Event.subscribe (“edge.remove”, function (response) {Tracking.trackSocial (‘facebook_unlike_btn_click’);}); };

var plusoneOmnitureTrack = function () {$ (function () {Tracking.trackSocial (‘google_plus_one_btn’);})} var facebookCallback = null; requiresDependency (‘https://connect.facebook.net/en_US/all.js#xfbml=1&appId=404047912964744’, facebookCallback, ‘facebook-jssdk’); });

jQuery (document) .ready (function () {window.fbAsyncInit = function () {FB.init ({appId: '404047912964744', // App ID channelUrl: 'https://static.ctvnews.ca/bellmedia/common /channel.html ', // Channel File status: true, // check login status cookie: true, // enable cookies to allow server to access session xfbml: true // parse XFBML}); FB. Event.subscribe ("edge.create", function (response) {Tracking.trackSocial ('facebook_like_btn_click');});

// BEGIN: Facebook clicks on unlike button FB.Event.subscribe ("edge.remove", function (response) {Tracking.trackSocial ('facebook_unlike_btn_click');}); };

var plusoneOmnitureTrack = function () {$ (function () {Tracking.trackSocial ('google_plus_one_btn');})} var facebookCallback = null; requiresDependency ('https://connect.facebook.net/en_US/all.js#xfbml=1&appId=404047912964744', facebookCallback, 'facebook-jssdk'); });

Read the original article here

Denial of responsibility! Verve Times is an automated aggregator of all media in the world. In each content, the hyperlink to the main source is specified. All trademarks are the property of their rightful owners, all materials to their authors. If you are the content owner and we do not want to publish your materials, please contact us by email- [email protected]. The content will be deleted within 24 hours.