New studies in many countries around the world and the rapid spread of coronavirus in Massachusetts have prompted US officials to raise new questions about how the virus spreads.
These experts say the virus is mostly spread by people who have shown symptoms, such as fever, cough or difficulty breathing. If this is true, it is good news because identifying and then isolating them makes it possible to stop the spread.
Another study says the greatest risk comes from people who have the virus but do not show symptoms as they become infected with multiple outbreaks.
However, experts say asymptomatic transmission can occur, but this is not the most important factor in spreading the virus. The main focus should continue to be on people who exhibit symptoms.
Some experts, interviewed by CNN, said it is still unclear what percentage of the virus spread comes from people who show symptoms and how much comes from those who do not have symptoms, but what is being realized day after day is that people who do not show symptoms are responsible for a larger spread than we thought.
