The sacrifices made to protect people during the coronavirus pandemic must not be squandered over the festive period, the World Health Organization's chief said in a Christmas message.
Millions were making "heart-wrenching sacrifices" by staying away from loved ones on Christmas Day, Tedros Adhanom Ghebreyesus said in a video clip posted to Twitter late Thursday, while others will have a missing face at the family table.
He said vaccines, now beginning to be deployed in countries around the world, were starting to offer a way out of the crisis that has engulfed the planet this year.
"As 2020 draws to an end, a pandemic of historic proportions is preventing many of us from celebrating in the ways we would like," Tedros said.
Frequently Asked Questions
A vaccine works by mimicking a natural infection. A vaccine not only induces immune response to protect people from any future COVID-19 infection, but also helps quickly build herd immunity to put an end to the pandemic. Herd immunity occurs when a sufficient percentage of a population becomes immune to a disease, making the spread of disease from person to person unlikely. The good news is that SARS-CoV-2 virus has been fairly stable, which increases the viability of a vaccine.
There are broadly four types of vaccine — one, a vaccine based on the whole virus (this could be either inactivated, or an attenuated [weakened] virus vaccine); two, a non-replicating viral vector vaccine that uses a benign virus as vector that carries the antigen of SARS-CoV; three, nucleic-acid vaccines that have genetic material like DNA and RNA of antigens like spike protein given to a person, helping human cells decode genetic material and produce the vaccine; and four, protein subunit vaccine wherein the recombinant proteins of SARS-COV-2 along with an adjuvant (booster) is given as a vaccine.
Vaccine development is a long, complex process. Unlike drugs that are given to people with a diseased, vaccines are given to healthy people and also vulnerable sections such as children, pregnant women and the elderly. So rigorous tests are compulsory. History says that the fastest time it took to develop a vaccine is five years, but it usually takes double or sometimes triple that time.
"Instead, hundreds of millions of people are today making great, heart-wrenching sacrifices by staying apart to stay safe.
"But in doing so, they are giving the most precious gifts: the gifts of life and health."
The novel coronavirus has killed at least 1.7 million people since the outbreak emerged in China last December, while almost 78.7 million cases have been registered, according to a tally from official sources compiled by AFP.
"All around the world, throughout this most trying of years, we have seen over and over again the sacrifices of so many people to protect and preserve life," said Tedros.
"We must not squander their sacrifices, nor those made by so many families who, this holiday season, will sit at family tables missing a familiar face.
"Despite so much loss, we have built so much hope. Vaccines are offering the world a way out of this tragedy. But it will take time for the whole world to be vaccinated."
According to the WHO's overview of different candidate vaccines, 61 have entered human trials, 16 of which have reached final-stage mass testing.
A further 172 candidate vaccines are being developed in laboratories with a view to eventual human testing.
Tedros said: "We must continue taking comfort in the fact that by caring for others, through acts of solidarity and safety, we can share the greatest gift of all: the gift of life."
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