حيث أنهم لا يعلمو مدى تحصين اللقاح لإخذه والمدة التي ينتهي فيها التأثير ويعود الشخص عرضة للمرض مره أخرى أو يبدأ في أخذ جرعات من اللقاح جديدة! لتأمين دوام الوقاية تماماً مثل لقاحات الأنفلونزا هنا يتكلموا عن الجرعة الثالثة أو المنشطة !! كذلك سيتم الأعتراف قريباً بأن لقاحات فايزر وموديرنا تسبب في بعض الأشخاص أعراض قد تكون مميتة في عضلة القلب
Booster shots may NOT be needed this autumn but the elderly and NHS will be first in line if they are, claims one of No10's top vaccine advisers
Booster Covid vaccines may not be needed this autumn, one of the Government's top experts claimed today.
Professor Adam Finn, from the Joint Committee on Vaccination and Immunisation (JCVI) - which advises No10, insisted top-up jabs may well be required for the very elderly and NHS workers.
But he admitted there was still a 'high level of uncertainty' over whether they would be necessary for millions of other Brits.
Scientists had expected the protection given by vaccines to begin to wear off over time but they don't yet know how long immunity from Covid jabs lasts for.
Influenza vaccines are needed every winter because the virus is constantly evolving to beat the human immune system.
Coronaviruses tend to mutate slower and academics have claimed they've yet to see any proof of waning immunity in vaccinated Britons.
Last month Matt Hancock announced at a Downing St press conference scientists were beginning trials of a third jab to check if it offers better protection.
Millions more vaccine doses than necessary have been bought by the Government and a giant order of 60million more Pfizer doses in April was earmarked for a top-up campaign in the autumn.
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British health chiefs could soon issue a warning that Pfizer and Moderna's Covid jabs are linked to heart issues in extremely rare cases, experts believe.
Fears about the two jabs causing myocarditis have grown in recent weeks, following a string of cases in young adults and children in Israel and the US.
American regulators have already accepted there is a 'likely link' between the heart condition and the vaccines, and will add warnings about the potential complication on information sheets given to the public.
Last week the Medicines and Healthcare products Regulatory Agency (MHRA), which polices the safety of drugs in the UK, said rates of myocarditis among vaccinated adults were 'similar or below' expected levels.
But last night, MailOnline can reveal the watchdog dropped all mention of how often the complication was occurring. Instead, it just updated its weekly summary to say cases were 'very rare' and 'typically mild'.
One cardiologist said he believed it the change in tone may signal that the body was going to accept a link between the two vaccines and myocarditis.
Other experts warned it further complicated the debate about vaccinating children in Britain.
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WHAT IS MYOCARDITIS?
Myocarditis is an inflammation of the heart muscle. There are no specific causes of the condition but it is usually triggered by a virus.
Some of the most common infections which cause myocarditis, are those called adenovirus and Coxsackie B.
It can be caused by the common cold, hepatitis B and C, and herpes simplex virus.
The most common symptoms of the condition include chest pain, a fever, a fast heartbeat, tiredness and shortness of breath.
If the inflammation damages the heart muscle or the fibres that conduct electrical pulses to the heart, complications can develop.
They can develop quickly, and include sudden loss of consciousness, an abnormally fast, slow or irregular heartbeat.
In very severe cases the condition is fatal, causing heart failure or sudden death. The inflammation enlarges the heart and creates scar tissue, forcing it to work harder and therefore making it weaker.
In most cases of viral myocarditis, the illness goes away and there are no complications.
But in rare cases when inflammation is severe, there can be damage to the heart which needs monitoring and possibly a heart transplant.
Myocarditis can reoccur, but there is no known way to prevent this. The risk of recurrence is low, around 10 to 15 per cent, according to Myocarditis Foundation.
It is difficult to gauge the prevalence of myocarditis because there is no widely available test for it.
In 2010, approximately 400,000 people died of heart muscle disease - cardiomyopathy that includes myocarditis - worldwide.
Expert consensus opinion estimates that up to 40 per cent of dilated cardiomyopathy results from myocarditis, according to the National Organisation for Rare Disorders.
الموضوع في دايلي ميل
https://www.dailymail.co.uk/news/article-9725051/UK-health-chiefs-say-rates-myocarditis-higher-expected-amoung-young-adults.html
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