The updated strategy to overcome new challenge: Omicron variant (B.1.1.529) pandemic.

The new variant was discovered in South Africa and threatened the word of concerning new pandemic coming from this variant. The Omicron variant likely would spread more easily than the original SARS-CoV-2 virus, and can spread the virus to others, even if they are vaccinated or don't have symptoms. WHO first reported the new strain on November 24, 2021, after a case was reported in South Africa in November, later calling it a 'variant of concern' and that early evidence 'suggests an increased risk of reinfection'. Following the discovery of the SARS-CoV-2 Omicron variant (B.1.1.529), the global COVID-19 outbreak has resurfaced after appearing to be relentlessly spreading over the past two years.