Doubts remain about the
effectiveness of the Oxford-AstraZeneca vaccine against Covid-19, but far more
doses of the Pfizer-BioNTech vaccine are currently available in Portugal.
So far, Portugal has received
42,300 AstraZeneca doses compared to almost 390,000 doses of Pfizer-BioNTech,
but only 19,200 doses of Moderna. More batches of all three of these vaccines
are expected this month. Coronavirus vaccinations are free for all in this
country.
Doubts about AstraZenica began
recently when South Africa halted using it because of a study suggesting it may
have only limited use against new variants of coronavirus. Portugal's national health authority has advised that it is preferable to use a vaccine other than
AstraZenica for those aged 65 and over.
Germany, France, Austria and
Norway are now only administering AstraZeneca to those aged under 65. Poland is
restricting its use to those under 60 and Italy and Spain to the under-55s.
World Health Organisation
officials have offered reassurance that AstraZeneca jabs will prevent serious
illness and death, even from the new South African strain of the virus.
Meanwhile, it is argued that all
vaccines seem to be less effective against mutant strains of coronavirus. There
is confidence in the UK, however, that AstraZeneneca is highly effective
against the dominant type of virus and it continues to be widely used in
Britain.
Some 340 million doses of
AstraZeneca vaccine are to be shipped from the WHO-supported Covax global
procurement facility to poor countries, including several in southern Africa.
A spokesman for the WHO team who
recently returned from an investigative visit to Wuhan in China said they had
not yet determined the precise origins of the Covid virus in December 2019, but
thought it most likely to have had an animal source. They dismissed as very
unlikely that it originated as a leak from a laboratory.