A new study claims that the genetic structure of SARS-CoV-2 could have been manipulated, particularly in its chimeric structure and furin cleavage site.
AstraZeneca recognized a key error in the vaccine dosage which some study participants received, about the apparently spectacular efficacy of its vaccine is now in question.
Sputnik V reported 91.4-percent effectiveness from a second interim evaluation of over 18,000 people, strengthening a claim the team made on November 11 with limited evidence.