Weekly Operational Update on COVID-19 (As of 4 August 2021) Format Overview In this edition of the COVID-19 Weekly Operational Update, highlights of country-level actions and WHO support to countries include: Supporting COVID-19 emergency preparedness and response in Thailand Supporting treatment of COVID-19 patients across Yemen Facilitating the implementation of Single Nucleotide Polymorphism (SNP) assays to detect SARS-CoV-2 variants in Ukraine More than one million COVID-19 vaccines arrive in Lao People's Democratic Republic through the COVAX Facility Driving COVID-19 vaccine uptake in Ghana's hard-to-reach communities Progress on a subset of indicators from the SPRP 2021 Monitoring and Evaluation Framework Updates on WHO's financing to support countries in SPRP 2021 implementation and provision of critical supplies.