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'Omicron may have higher reinfection risk, but': 10 things WHO's latest report reveals

Even if Omicron turns out to be less dangerous, it could still affect more people, overburden the health system, as it transmits rapidly, WHO said in its latest report calling for strengthening the surveillance. 
Omicron has a risk of reinfection but possibly causes milder infections, WHO said based on available data. (AP)
Published on Dec 09, 2021 08:37 AM IST
By | Written by Poulomi Ghosh

The World Health Organization said early data indicates that Omicron, the latest variant of the SARS-CoV-2 first found in South Africa, may easily infect people who have either been infected earlier or vaccinated. But the disease will be milder than what the Delta variant led to, WHO said.

"Emerging data from South Africa suggests increased risk of reinfection with Omicron," World Health Organization chief Tedros Adhanom Ghebreyesus told reporters, adding that "there is also some evidence that Omicron causes milder disease than Delta".

The new variant was found in the last week of November and since then it has now spread to around 57 countries. No death has been linked to this variant and patients are recovering without hospitalisation, without requiring oxygen support.

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10 things WHO confirms about Omicron

1. Omicron cases have been reported in 57 countries across all WHO regions. While most of the cases identified in these countries are currently travel-related, this may change as more information becomes available, it said.

2. WHO emergencies director Michael Ryan said the variant is efficiently transmitting and probably more efficiently transmitting than Delta, but that does not mean the virus is unstoppable.

3. Even if it turns out to be less dangerous, it could still affect more people, overburden the health system, as it transmits rapidly, WHO said. 

4. Even if vaccines prove less effective against Omicron, as some data indicates, they are still expected to provide significant protection against severe disease, it said.

5. Regarding Omicron's impact on vaccines, WHO said, "There is a need for more data to assess whether the mutations present on the Omicron variant may result in reduced protection from vaccine-derived immunity and data on vaccine effectiveness, including the use of additional vaccination doses."

6. In South Africa, seroprevalence is 60 to 80% while vaccination coverage is 35%. But Omicron has spread rapidly as it poses reinfection threats.

7. On the severity of Omicron, WHO said even if the severity is equal or potentially even lower than for the Delta variant, it is expected that hospitalizations will increase if more people become infected and that there will be a time lag between an increase in the incidence of cases and an increase in the incidence of deaths.

8. Providing data of 212 confirmed Omicron cases identified in 18 EU countries till December 6, WHO said all these were mild cases. South Africa saw an 82% increase in hospital admission between November 18 and December 4, but it is not known whether Omicron is the reason.

9. WHO cited the forecast of the European Centre for Disease Prevention and Control that if 1% of SARS-Cov-2 infections are due to the Omicron variant, it will become dominant in Europe by January 1, 2022.

10. Though there has been no report of any severe disease from Onicrom, WHO said Interleukin-6 Receptor Blockers and corticosteroids are expected to continue to be effective in the management of patients with severe disease.

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