Why are scientists so concerned about Omicron?
The decision to classify Omicron as a variant of concern was based on evidence presented to the WHO's Technical Advisory Group on Virus Evolution. This evidence suggested the new variant has several mutations that could impact how easily it spreads, the severity of illness it may cause and, crucially, the effectiveness of existing COVID-19 vaccines. This is what we know so far about Omicron:
Is it transmitted more easily?
The WHO says it's not yet clear if the Omicron variant is spread from person-to-person more easily than other variants, including Delta. The number of people testing positive for COVID-19 has risen in the area of South Africa where Omicron was first identified. More research is being carried out to determine whether this is due to Omicron, or to other factors.
Does Omicron cause more severe illness?
Early data from South Africa shows the rate of hospitalization is rising among COVID-19 patients. However, there is no evidence so far that directly links infection with Omicron with an increased need for hospital treatment. The WHO says the rise in hospitalizations may be due to a general rise in infection rates. Many of the early Omicron cases reported in South Africa were among students. With other COVID-19 variants, younger people have generally had milder symptoms. There is currently no evidence to suggest Omicron symptoms are different, but it will likely take weeks to determine if Omicron causes more severe illness among the general population.
Will existing COVID-19 vaccines and other treatments work against the Omicron variant?
The WHO says it's working with partners to understand the potential impact of Omicron variant on the effectiveness of vaccines and other COVID-19 countermeasures. Corticosteroids and IL6 Receptor Blockers will still be effective against severe disease, the WHO advises. As research continues, the WHO is reminding people that vaccines remain effective against other COVID-19 variants - including the dominant Delta strain - and are the best way to avoid severe disease and death.
Does Omicron increase the risk of reinfection?
Preliminary research shows the new variant may increase the risk of reinfection for people who have already had COVID-19, according to the WHO. However, data is currently limited and more information should be made available in the coming days. In terms of testing for infections, existing PCR tests are effective at detecting the Omicron variant.
What can people do to protect themselves?
The WHO is reminding people that the best way to stop the spread of COVID-19 is to socially distance, staying at least 1m from others; wear a well-fitting mask; open windows to improve ventilation; avoid poorly ventilated or crowded spaces; keep hands clean; cough or sneeze into a bent elbow or tissue; and get vaccinated when it’s your turn.
