Like a real virus, however, a computer virus can infect — and even hijack — its host computer.) Some non-enveloped viruses, such as the polio virus, create a porous channel of entry and burrow through the membrane. Medicines to treat viruses exist. The new virus appears to be spreading from person to person. Another enveloped virus, the influenza virus, is engulfed by the cell. It may be spread by respiratory droplets when someone coughs or sneezes. The body can rid itself of many viruses on its own. COVID-19 is a new strain of coronavirus that has not been previously identified in humans. Called antivirals, they work in different ways. They can spread much like cold viruses. Virus particles are about one-millionth of an inch (17 to 1,000 nanometers) long [source: Milo and Phillips]. Most viruses are many times smaller than bacteria, though giant viruses … A coronavirus is a type of common virus that can infect your nose, sinuses, or upper throat. Some, for example, block the entry of a virus … Since … Research is ongoing. If you could look at a virus, you would see that a virus is a tiny particle. But it's unclear exactly how it spreads or how contagious it is. The COVID-19 is the cause of an outbreak of respiratory illness first detected in Wuhan, Hubei province, China. Almost everyone gets a coronavirus infection at least … This virus … Other viruses may present too big a challenge.