A healthcare worker in the US tested positive for the deadly Ebola virus that has claimed more than 3700 lives since march this year. The health worker an employee of Texas Health Presbyterian Hospital in Dallas helped treat Thomas Eric Duncan the first US patient diagnosed with the Ebola virus. Texas health authorities revealed that the worker has tested positive for the disease in the preliminary test who has been isolated since the worker reported low-grade-fever.(Read: What is the Ebola virus disease survival rate?) A preliminary test done at a state public health laboratory in Austin capital of Texas showed