Since the Danbury Health Department began a Tick Analysis program, 44 ticks were submitted for testing to Connecticut Agricultural Experiment Station.  20-percent tested positive for an agent that causes illness in humans.  The Department is reminding people that the average deer tick can live for two years and can survive in very cold climates. Although infection rates drop in the winter, mostly because people spend less time outdoors, officials say it's still possible to contract Lyme Disease.  Blacklegged ticks, which carry Lyme disease, will remain active as long as the temperature is above freezing.