TOKYO (March 10): Nine new incidents of women in Japan experiencing severe allergic reactions after receiving a coronavirus vaccine, reported Xinhua news agency quoted local media on Wednesday.
According to Japan's health ministry and local accounts, medical facilities reported that female medical workers aged in their 20s to 50s experienced anaphylaxis after receiving the coronavirus vaccine developed by United States pharmaceutical giant Pfizer and its German partner BioNTech SE.
The ministry here said the women who experienced anaphylaxis received the Pfizer jabs on Monday.
Despite displaying severe reactions, the ministry said they have all since recovered.
An investigation led by a panel of experts at the health ministry here has been charged with investigating whether the Pfizer jabs were responsible for sending the health workers into anaphylactic shock.
The ministry and local media reported that as of 5 pm on Tuesday, a total of 107,558 medical workers had been vaccinated, with anaphylaxis reported in 17 women.
Japan's public broadcaster NHK said the ratio of those going into anaphylactic shock after receiving the Pfizer jab was about one in 6,300 people, which equates to about 0.00015 per cent.
Anaphylaxis is a potentially lethal and acute allergic reaction to an antigen to which the body has become hypersensitive.
The symptoms include, but are not limited to, coughing, wheezing, tightness in the chest, general pain, trouble breathing, rapid heartbeat, swollen or itchy throat, tightness in the throat, vomiting, diarrhoea and a weak pulse.
When someone goes into a potentially life-threatening anaphylactic shock, which among the symptoms will almost certainly include their blood pressure suddenly dropping, a narrowing of their airways, and the blocking of normal breathing, they need immediate emergency medical attention.
If the reaction is not treated immediately, it can result in serious complications and can be fatal.
In addition, according to health experts, as many as one out of every five people may have a second anaphylactic reaction within 12 hours of the first. This is known as biphasic anaphylaxis.
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