Methods for the detection and characterisation of SARS-CoV-2 variants: second update, 21 June 2022

This document aims to provide interim guidance for microbiology and virology experts, other laboratory professionals, laboratory managers, infectious disease programme managers, public health professionals and other stakeholders that provide primary, confirmatory or advanced testing for SARS-CoV-2, including genomic sequencing, or are involved in making decisions on establishing or scaling up capability and capacity to detect and characterize circulating SARS-CoV-2 variants.