CASES OF WEST NILE VIRUS CAUSED BY MOSQUITO BITES ARE INCREASE INCREASING IN MANY PARTS OF THE COUNTRY HERE IN PENNSYLVANIA AND IN NEW JERSEY. >> Jessica: RED LIGHT REPORTER STEPHANIE STAHL JOINS US WITH THE NEW WARNINGS. >> Reporter: FIRST HUMAN CASES OF WEST NILE VIRUSES BEING CONFIRMED LOCALLY. ONE IN CAMDEN AND THREE IN PHILADELPHIA. WEST NILE VIRUS INFECTIONS ARE THE LEADING OF MOSQUITO BORN DISEASE IN THE UNITED STATES. SINCE MOST PEOPLE DON'T KNOW THEY'RE INFECTED ACTUAL NUMBERS ARE UNKNOWN. THE CDC HAS CONFIRMED 216 CASES IN 31 STATES. THREE IN NEW JERSEY AND OF THE SEVEN IN PENNSYLVANIA, THREE ARE IN PHILADELPHIA. >> WE HAVE SEEN A SLIGHT INCREASE. >> Reporter: BURRISS IS WITH THE PHILADELPHIA HEALTH DEPARTMENT DIVISION OF DISEASE CONTROL. >> WE DID HAVE TWO INDIVIDUALS THAT WERE HOSPITALIZED AND BOTH WERE HAVING SOME SYMPTOMS SUCH AS A HIGH FEVER AND FLU-LIKE SYMPTOMS. >> Reporter: FORMER HEALTH OFFICIAL DOCTOR FAUCI IS INFECTED MUCH HE'S RECOVERING AT HOME AFTER BEING HOSPITALIZED. WHILE THE VAST MAJORITY OF WUEST NILE VIRUS CASES ARE NOT SERIOUS, SOME CAN BE. >> AND THIS CAN BE ANYTHING FROM PARTIAL PARALYSIS TO PAIN SUCH AS NEUROLOGIC PAIN, NEUROPATHY AND SOME PATIENTS CAN ACTUALLY DIE FROM WEST NILE VIRUS IT'S NOT TO BE TAKEN LIGHTLY. >> Reporter: MOST PEOPLE HAVE NO SYMPTOMS. THOSE WHO DO BECOME STOTT MA'AM TICK CAN EXPERIENCE FEVER, BODY ACHES, JOINT PAINS AND RASH. TO PROTECT YOURSELF DOCTORS RECOMMEND USING INSECT REPELLENT CONTAINING DEET OR PIT CARDIN AND GET RID OF MOSQUITO BREEDING AREAS. >> IF THEY HAVE STANDING WATER THAT IS AROUND THEIR HOME. TRY TO ELIMINATE THAT TO REDUCE THE AMOUNT OF MOSQUITOES. >> Reporter: TO REDUCE THE RISK OF INFECTION PEOPLE SHOULD WEAR LONG SLEEVED SHIRTS AND LONG PANTS AND LIMIT OUTDOOR EXPOSURE FROM DUSK TO DAWN WHO MOSQUITOES MOST ACTIVE. NOW WEST NILE VIRUS IS DIAGNOSED WITH A BLOOD TEST. THERE IS NOT A SPECIFIC TREATMENT. IT USUALLY RESOLVES ON ITS OWN IN A WEEK OR TWO. YOU'LL ALSO NOTICE THERE IS MOSQUITO SPRAYING GOING ON IN A LOT OF COMMUNITIES ALSO IN AN EFFORT TO TRY AND TAP DOWN ON THESE MOSQUITOES. >> Jessica: OKAY. >> Reporter: DON'T