Appointments & care. At Mayo Clinic, we take the time to listen, to find answers and to provide you the best care. Respiratory syncytial virus (RSV) is a virus that causes infections of the lungs and respiratory tract.
2015 Hyundai Sonata Eco: Gas Mileage Review. The 2015 Hyundai Sonata Eco is the Korean maker's most fuel-efficient mid-size sedan that doesn't use a hybrid powertrain. And it highlights the two parallel paths that automakers are taking as they work to boost gas mileage ratings to meet steadily rising corporate average fuel economy rules.
1 This model of JP Enhanced Gas Ring is compatible with AR-15 Platform bolt chamber in 5.56 NATO / .223 Rem. / 2  300 Blackout. 3  If you need a .308 / 7.62 model, please look at the JP Enhanced Gas Rings for 308 AR Bolt.verview: If it looks like you need a replacement for the standard gas rings on your AR-15 bolt, you will find the JP Enhanced Gas Ring to be the ideal option.