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.
Dimensions. A traveler who brings carry-on luggage onto a United flight must bring a bag that is less than 22 inches tall. The luggage also needs to be less than than 14 inches wide and 9 inches deep.pace Issues. Any luggage that you bring on a United flight must be able to fit under your seat or in an overhead bin. In some instances -- particularly if you are among the last to board a plane -- there might not be a lot of room left to store a bag in an overhead bin.