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SARS-CoV-2 variants monitored through genetic sequencing

ECDC de-escalates BA.2, BA.4, and BA.5 variants

As of March 3, 2023, the European Centre for Disease Prevention and Control (ECDC) has removed BA.2, BA.4, and BA.5 from its list of SARS-CoV-2 variants of concern.

Surveillance through genetic sequencing

Scientists use genetic sequencing to identify and track variants of the virus. This process involves mapping the genetic material of the virus and comparing it to known sequences.

Variants identified since 2020

Since the emergence of SARS-CoV-2 in 2020, the virus has undergone numerous changes, resulting in multiple variants.

WHO's variant labeling system

In May 2021, the World Health Organization (WHO) introduced a system of simple, easy-to-say labels for key variants.

Ongoing research

Researchers at RIVM (the Dutch National Institute for Public Health and the Environment) are conducting laboratory studies to gain insights into the behavior of different variants.