> The Delta variant seems to flourish in the nose, the main port of entry for the virus. The vaccines are injected into muscle, and the antibodies produced in response mostly remain in the blood. Some antibodies may make their way to the nose but not enough to block it.
“The vaccines — they’re beautiful, they work, they’re amazing,” said Frances Lund, a viral immunologist at the University of Alabama at Birmingham. “But they’re not going to give you that local immunity.”
When the virus tries to snake down into the lungs, immune cells in vaccinated people ramp up and rapidly clear the inf…