APPLICATIONS Horn antennas are widely used as satellite dishes and radio telescopes. Antennas 6 2. PARABOLIC ANTENNAS A parabolic antenna is an antenna that uses a parabolic reflector, a curved surface with the cross-sectional shape of a parabola, to direct the radio waves.
Flu (influenza). Flu is usually infectious a day before symptoms start and remains infectious for about five to six days. Children and people with lowered immune systems may be infectious for a few days longer.
The QuickVue Influenza A+B Test is an accurate rapid flu test, that assists the doctor in making an accurate diagnosis.1. How Long Do Flu Symptoms Last? According to the CDC, the flu typically lasts anywhere from a few days up to 2 weeks after it has been contracted. The length of the flu may be longer than 14 days for those in high risk categories for the illness. This may include: children under five, pregnant women, people over 50 years of age, and those living in assisted care or nursing homes.