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This year has
been full of bad
because of COVID-19. Finally, there is good news. Scientists announced a
in the fight against the virus. The scientists are from the U.S. drug company Pfizer and the German
BioNTech. Researchers have developed a
against COVID-19 with a 90 per cent success
. The researchers say the vaccine has no
side effects. The head of the USA's National Institute of Allergy and Infectious Diseases said the vaccine was
news. He said: "The results are really
good, I mean
."