In people with very weak immune systems, the virus can bring on a serious brain infection called progressive multifocal leukoencephalopathy (PML). PML damages the outer coating of your nerve cells.

Biological scientists have uncovered how the dengue virus uses its envelope protein to capture human plasmin from a blood meal to enhance the permeability of the mosquito midgut for infection.

it can cross-protect against different influenza virus infections and can also work even after mutations occur," Xu said. In mouse experiments, researchers delivered a single dose of the IgM ...