Canadian immunologists have identified a mechanism that promotes the activation of T cell receptors by altering how one of its components interacts with the cell membrane.
COVID-19 infections fell significantly—by 65% percent—after a first dose of the Oxford-AstraZeneca or Pfizer-BioNTech vaccines in this large community surveillance study.
In the minds of many, the halt of the Johnson & Johnson vaccine in April delivered doubt just as the mass COVID-19 vaccinations were making progress. […]