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Nobel Prize in Physiology or Medicine: 2023 award given to duo behind Covid vaccines


The Nobel Assembly at Karolinska Institutet has jointly awarded Katalin Karikó and Drew Weissman the 2023 Nobel Prize in Physiology or Medicine for their work in the fight against the coronavirus pandemic.

The honor was bestowed in recognition of their “discoveries concerning nucleoside base modifications that enabled the development of effective mRNA vaccines against COVID-19”.

The pair have been awarded a prize fund of 11 million Swedish kronor ($1million), which will be shared between them.

This is the first Nobel Prize announcement of this week, to be followed by the prizes for Physics tomorrow and Chemistry on Wednesday.

The Nobel Prize in Literature will be announced on Thursday, meanwhile, and the Peace Prize on Friday — followed by the The Sveriges Riksbank Prize in Economic Sciences in Memory of Alfred Nobel on the Monday of next week.

In a press release, The Nobel Assembly at Karolinska Institutet said: “The discoveries by the two Nobel Laureates were critical for developing effective mRNA vaccines against COVID-19 during the pandemic that began in early 2020.

“Their groundbreaking findings […] have fundamentally changed our understanding of how mRNA interacts with our immune system.”

Karikó and Weissman, they added, have “contributed to the unprecedented rate of vaccine development during one of the greatest threats to human health in modern times.”

The duo have previously won several other awards for their work, including the Breakthrough Prize in Life Sciences, the Lasker–DeBakey Clinical Medical Research Award and the Tang Prize Award in Biopharmaceutical Science.

Commenting on the announcement, immunologist Professor John Tregoning of Imperial College London said: “Kati Karikó is one of the most inspirational scientists I have met.

“The ideas that she and Drew Weismann developed were critical for the success of RNA vaccines.

“They demonstrated that changing the type of the RNA nucleotides within the vaccine altered the way in which cells see it.

“This increased the amount of vaccine protein made following the injection of the RNA, effectively increasing the efficiency of the vaccination: more response for less RNA.

“This was a vital building block of the success of the RNA vaccines in reducing disease and death during the pandemic.

“Their work shows the importance of basic, fundamental research in the path to solutions to the most pressing societal needs.”

Professor Brian Ferguson is an immunologist with the University of Cambridge, England.

He added: “It is wonderful news that the Nobel Prize winners for medicine/physiology in 2023 are scientists who worked for decades building knowledge and understanding that underlies the design and manufacture of mRNA vaccines that saved so many lives during the COVID-19 pandemic.

“What is now recognised as a transformative technology required dedicated scientists to carry out fundamental research over many years to reach the position it was in 2020 when its rapid deployment as a vaccine technology was made possible by global collaboration.

“The work of Katalin Karikó and Drew Weissman in the years prior to 2020 made this possible and they richly deserve this recognition.”

The Nobel Prizes are awarded each year for “contributions that conferred the greatest benefit to humankind in the areas of Physics, Chemistry, Physiology or Medicine, Literature and Peace”. They are typically regarded as the most prestigious awards in these fields.

The prizes were established by the Swedish chemist Alfred Nobel who — on his death in 1896 — left all of his “remaining realizable assets” to set up the awards, with the first iteration being awarded in 1901.

While apocryphal, a story goes that Nobel was motivated to create the prizes after reading his unflattering (and premature) obituary published by a French newspaper in error, shortly after the death of Alfred’s brother, Ludvig.

The obituary is reported to have damned him for his invention of military explosives, saying “Le marchand de la mort est mort (“The merchant of death is dead”) — and accusing Nobel of becoming rich by finding ways to kill people “faster than ever before”.

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