The World Health Organisation (WHO) has emphasized the importance of countries maintaining robust surveillance of Covid-19 cases and continuing to share genomic sequencing data. In a video message released by the WHO, Dr Maria Van Kerkhove, the Covid-19 technical lead, addressed the recent surge in Covid-19 cases observed in various countries. She highlighted multiple factors contributing to the surge, including heightened gatherings during the holiday season and the prevalence of other respiratory infections.
As a response to the spike in Covid-19 cases, particularly attributed to a new dominant strain called JN.1, a sublineage of the Omicron sub-variant BA.2.86, the WHO urged adherence to public health advice and precautions. India, as part of routine surveillance by the Indian SARS-CoV-2 Genomics Consortium (INSACOG), also reported the detection of the Covid sub-variant JN.1 in Kerala.
Dr Kerkhove explained that the surge is not solely due to Covid-19 but is exacerbated by a combination of factors, including the co-circulation of influenza, other viruses, and bacteria. The winter season in some parts of the world, coupled with increased indoor gatherings during the holiday season, contributes to the efficient spread of these pathogens, particularly those transmitted through the air.
Acknowledging the evolution of the virus, Dr Kerkhove noted that 68% of current cases involve XBB sublineages, including JN.1. She underscored the varying severity of cases associated with JN.1, ranging from asymptomatic infection to severe illness and death, similar to other Omicron sublineages.
Dr Kerkhove urged individuals to prioritize preventive measures, including vaccination, to protect against severe disease and death. She emphasized the continued effectiveness of Covid-19 vaccines against all circulating variants, including JN.1. Additionally, she advised clinical care for those who contract the virus and stressed the importance of adhering to public health guidelines.
In response to the surge in cases, Singapore's Ministry of Health (MOH) has recommended the use of masks in crowded places, especially indoors, and encouraged travelers to adopt precautions such as mask-wearing at airports and avoiding poorly ventilated crowded areas.
