A scientific team comprising a number of prominent virologists in the United Kingdom (UK) warned that the effectiveness of the anti-corona vaccines may retreat over the next years to come so campaigns of vaccination must continue to check the deadly virus.
Members of the team work for Imperial College in London, Birmingham University, UK, and the National Health Service (NHS).
The experts signed a petition titled: What is the expected period to continue vaccination against the Coronavirus (known also as COVID-19).
The petition revealed that it is very possible that the immunity created by the anti-corona vaccines will retreat as time passes but symptoms won't be very complicated as they are nowadays.
The scientists added that the campaigns will run for years and some people will receive more doses to protect them from the pathogen.
However, the Director-General of the World Health Organization (WHO), Dr. Tedros Adhanom Ghebreyesus has warned of the possibility of the emergence of a new strain of the Coronavirus (known also as COVIDID-19).
He stressed the possible new strain may be more dangerous than the " Delta" strain which sweeps through the globe now and causes about 90% of infections across the world.
Dr. Ghebreyesus indicated during a speech in the 138th edition of the International Olympic Committee (IOC) that the emergence of a news strain of COVID-19 may lead to spreading out of infraction in all parts of the world.
He added that as the Coronavirus invades the planet, new very dangerous variants of the deadly may be more serious than the "Delta" which causes many harms to populations of dozens of countries in the present time.
He warned that many strains of the COVID-19 may lead to appear of a new variant that could trespass all anti-Corona vaccines and then return the world to the starting point.
He depicted the current situation as the world witnesses unprecedented crisis so it needs unprecedented decisions to handle it.
The Director-General of the WHO announced that the main target of the organization is vaccinating 70% of the world's population in all countries by September 2022.
He went to say that the pandemic could be checked by providing about eleven billion doses of the anti-Corona vaccines.
It is worth noting that the Emergency Committee of the WHO has declared the danger of the emergence of new strains that may be more serious than the ones that spread now in the world.
The committee listed four variants of the COVID-19. Those strains are "Alfa" that was detected for the first in Britain, "Beta", detected in South Africa," Gama", detected in Brazil, and "Delta" that was detected for the first time in India.
The last strain spreads faster than the others across the planet.
The committee indicated that the deadly virus is continuing mutating as the "Delta plus" strain has emerged recently.
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