Here's why:
* Rabies is a neurotropic virus: This means it specifically attacks the nervous system. Once the virus reaches the brain, it's essentially too late.
* The immune system is too slow: While your body's immune system can recognize and fight off rabies, it's not fast enough to prevent the virus from traveling to the brain. By the time the immune response kicks in, the virus has already done significant damage.
What your body's defenses DO in a rabies infection:
* Initial immune response: When the virus enters your body, the immune system recognizes it as foreign and mounts an initial defense. This involves inflammation, recruitment of immune cells, and production of antibodies.
* Virus travels to the brain: However, rabies is very good at evading the immune system. It travels along nerves to the brain, where it replicates rapidly and causes severe neurological damage.
* Delayed immune response: While the immune system may eventually catch up, this is usually too late to prevent the fatal effects of rabies.
Prevention is key:
* Vaccination: The most effective way to protect against rabies is through vaccination.
* Post-exposure prophylaxis: If you are exposed to rabies, immediate treatment with a series of vaccinations and immunoglobulin can help prevent the disease.
It's crucial to seek medical attention immediately if you suspect you have been exposed to rabies. Do not rely on your body's defenses to fight off the virus.