A virus is basically a tiny bundle of genetic materialâeither DNA or RNAâcarried in a shell called the viral coat, or capsid, which is made up of bits of protein called capsomeres. Some viruses have an additional layer around this coat called an envelope. That's basically all there is to viruses. virus is basically a tiny bundle of genetic materialâeither DNA or RNAâcarried in a shell called the viral coat, or capsid, which is made up of bits of protein called capsomeres. Some viruses have an additional layer around this coat called an envelope. That's basically all there is to viruses.
For all United EconomyÂ® tickets, Premier Gold members are eligible for two complimentary checked bags at 70 pounds (32 kg) each for travel between the U.S., Canada, Puerto Rico and the U.S. Virgin Islands.
Spirit Air to charge up to $100 for carry-on bags. Spirit Airlines will charge $100 for carry-on baggage purchased at the gate, starting Nov. 6. NEW YORK (CNNMoney) -- Spirit Airlines will raise its fee for carry-on bags to up to $100, becoming the first U.S. airline to charge so much for a service that most other airlines offer for free. Spirit said on its website that the new fees apply to carry-on bags registered at the gate and will become effective Nov. 6.