Mark Striegl was set to make his first appearance in the UFC but he tested positive for Covid-19. Below is his post in his social media page.

Mark Striegl was set to make his first appearance in the UFC but he tested positive for Covid-19. Below is his post in his social media page.

Scientists have uncovered how a key type of immune cell adapts its behaviour depending on the type of infection, paving the way for better vaccines