Because the virus evolves so rapidly, having it once doesn’t provide much long-term immunity. And it also doesn’t help that there’s not a vaccine for norovirus yet. People with Type O blood ...
But it quickly became apparent that SARS-CoV-2, the virus that causes COVID-19, was so much ... A macrophage is a type of white blood cell that stimulates other immune system cells.
It turns out that vaccine durability has much to do with a type of blood cell called megakaryocytes ... yellow fever, malaria and COVID-19. The same signs of megakaryocyte activation were ...