Some people with COVID-19 have no symptoms at all. When symptoms do occur they usually begin about 5 days after exposure to the virus, but may appear as soon as 2 days after exposure. In fact, asymptomatic individuals are more likely to spread the virus simply because they tend to practice less safety and isolation than those with symptoms.
The government guidelines suggest that 1 in 3 people who have COVID-19 have no symptoms. It seems that this occurs more often in the healthiest and the younger age groups, including most children. Antibody testing helps us to understand how many people have had coronavirus unknowingly, with or without symptoms. At the moment, whether you can book antibody testing depends on your job and where you live. In most situations it is not available on the NHS.
For more information on COVID-19, please visit the CDC's FAQs page.