Two doses of Pfizer’s Corona vaccine will probably not be enough. What is the reason?

Will we need a third, fourth and fifth dose of the vaccine against the emerging corona virus “Covid-19”? How effective is the Chinese CoronaVac vaccine in preventing Corona death? And why should young people get the Corona vaccine? Answers in this report.

We’re starting in America, where Albert Burla, CEO of Pfizer, said people who received the Pfizer vaccine for Corona – “very likely” – would need a third dose within 6 months to a year, then a dose. every year. Read also Coronavirus symptoms: 33 signs of infection Watch … the differences between Corona vaccines in one table What is the relationship of Johnson & Johnson vaccine against clots? British researchers: Risk of stroke as a result of Corona is more higher than the vaccine result

Burla explained the day before yesterday, Thursday – in statements reported by “CNBC” – that “there is a reasonable assumption that a third dose will probably be needed, between 6 and 12 months, and after that there will be a vaccination once. per year, but “All of this has yet to be confirmed.”

He added: “On the other hand, the mutated versions (of the Coronavirus) will play a major role”. He continued: “It is very important to reduce the number of people exposed to HIV infection.”

And the alliance “Pfizer – BioN Tech” (Pfizer – BioN Tech) announced last February that it was studying the effects of a third dose of its vaccine against mutants in a clinical study.

Pfizer had reported in early February that it was experimenting with booster doses in anticipation of their need.

The US company Moderna – which produces a vaccine for Corona – said it was also testing booster doses of its vaccine.

The “Pfizer-Biontech” vaccine, developed by the American company “Pfizer” and its partner, “Biontech”, Germany, works on “messenger RNA” or “mRNA” technology, which is a molecule that tells our cells what it is. ‘We have to do. .

This vaccine is injected into the body, and it introduces this molecule which controls a mechanism for making an antigen specific for the Corona spike virus, which is a very distinctive tip that is present on its surface and allows it to adhere. to human cells to penetrate it. This peak will then be detected by the immune system, which will produce the antibodies, and these antibodies will stay for a while.

The Moderna vaccine uses the same “messenger RNA” technology as the “Pfizer-Biontech” vaccine. Publicity

How effective is the Chinese Coronavac vaccine in preventing Corona death?

The Chinese “Coronavac” vaccine was found to be 67% effective in preventing symptoms of Covid-19, and 80% in preventing death, according to field results revealed on Friday during the vaccination campaign in Chile , and reported by the French Press Agency.

“These figures bring peace of mind to the country,” Chilean Minister of Health Enrique Paris told reporters, while announcing the results of two months of vaccination in Chile in February and March.

The results were obtained from a comparison between vaccinated and unvaccinated people, with a sample size of approximately 10.5 million in total.

“Koronavac” accounted for 86.9% of the immunization record in Chile, while the others received doses of the “Pfizer” vaccine.

The results were revealed at a time when Chile – as is the case in most countries in South America – suffered a record number of injuries. And it recorded a record number of new confirmed infections, amounting to more than 9 thousand in one day.

Coronavac test results in Brazil have shown about 50% effectiveness in preventing symptomatic infections.

Young people and the Corona vaccine

Many young people have chosen not to receive Corona vaccines for fear of their potential effects on their health; Is there really a justification for these concerns? What is the impact of the reluctance of young people to vaccinate campaigns on efforts to contain the pandemic?

In a report published by the British newspaper “The Independent “, the writer Sean O’Grady says that health data around the world shows that the rates of infection and death – from the Corona virus for those under 40 years of age – are very low, especially for those who do not suffer from chronic diseases.

For most of the young people infected with the virus, symptoms were limited to a loss of smell and taste for a limited period, accompanied by coughing and headaches.

So what is the benefit of the vaccine for young people if the virus does not present a great risk? The answer is what has come to be known as “long Covid” or “post-infection Covid-19 syndrome,” that is, symptoms that persist long after infection with the virus.

This condition is not yet scientifically clear due to the recency of the disease, but what is clear is that it can affect young people and change their lives and last with them for a long time.

Long-term effects may include problems climbing stairs or difficulty breathing. This can affect family life and employment opportunities and threaten the quality of life and general well-being of the young person.

The British Medical Journal (BMJ) published a report on a study in which a group of Covid-19 patients had an average age of 44 and did not suffer from any other health problems. https://www.youtube.com/embed/Rv-jHWxRqHI?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=ar&autohide=2&wmode=transparent

The virus evolves

The study found that “the most frequently reported symptoms – regardless of the condition in which the patient was hospitalized – were fatigue (98%), muscle pain (88%), shortness of breath (87% ) and headaches (83%). . “

In addition, there were signs of mild heart failure in 32% of patients and decreased function of the lungs (33%), kidneys (12%), liver (10%), pancreas (17%). ) and the spleen (6%).%).

The writer confirms that what worries the virus is that it is constantly evolving and changing to stay alive, and that it is looking for new victims as soon as possible so that it does not go out and become extinct. can therefore begin to spread between younger age groups, including children.

The author believes that the possibility of a new strain of the virus targeting young people – which is scientifically possible – should motivate the generation to take the necessary precautions and get vaccinated, even if the vaccines are less effective against the new mutations. .

In fact, there is data indicating that even children are at risk of corona, for example, according to a report by the French Press Agency, in India, doctors are expressing concern, especially over the number of people infected with fewer 45 years old. and suffering from more severe symptoms than last year.

“We also find children under 12 and 15 showing symptoms. Last year, almost no child showed symptoms, ”Josraff Bajan, a doctor at Bombay National Hospital, told AFP.