Immunoglobulin G (IgG)
Covid-19 IgG Anti-body Test
Coronaviruses are a family of viruses that cause disease in animals. Seven, including the new Covid-19 virus, have made the jump to humans, but most just cause cold-like symptoms. Covid-19 is closely related to severe acute respiratory syndrome (Sars) which swept around the world in 2002 to 2003.
The spectrum of Covid-19 disease is broad, with around 80 per cent of cases leading to a mild infection. There may also be many people carrying the disease and displaying no symptoms, making it even harder to control.
So far, around 20 per cent of Covid-19 cases have been classed as "severe" and the current death rate varies between 0.7 per cent and 3.4 per cent depending on the location and, crucially, access to good hospital care.