The Omicron RF.5 sub-variant of SARS-CoV-2 was detected in Andhra Pradesh in mid-July 2026. Genome sequencing at the National Institute of Virology, Pune, confirmed the RF.5 sub-lineage in samples from Kadapa district.
Omicron and SARS-CoV-2 Lineages
SARS-CoV-2 is the virus that causes COVID-19, and Omicron is one of its major variants first identified in 2021. RF.5 is a sub-lineage of Omicron and belongs to the JN.1 evolutionary branch through LF.7 and PY.1.1.1.
Genome Sequencing and Genomic Surveillance
Genome sequencing is the laboratory process used to read the viral genetic code and identify mutations. The World Health Organization monitors new SARS-CoV-2 lineages through routine genomic surveillance, which tracks changes in circulating variants across countries and regions.
- The National Institute of Virology, Pune, is a major Indian laboratory for virology research and diagnostic confirmation.
- Kadapa district in Andhra Pradesh yielded the samples that were confirmed as RF.5.
- Four positive samples from Kadapa district were confirmed as RF.5 as of 19 July 2026.
Clinical Features and Public Health Response
Symptoms linked with RF.5 include sore throat, cough, fever, headache, runny or blocked nose, fatigue, and body aches. Health officials in Andhra Pradesh stated that there was no scientific evidence that RF.5 was more severe than earlier Omicron sub-variants. The Andhra Pradesh Health Department issued an alert across all districts on 20 July 2026. Hospitals were kept ready with isolation wards, testing kits, and related infrastructure for disease surveillance and case management.
Important Facts for Exams
- Omicron is a variant of SARS-CoV-2, the virus responsible for COVID-19.
- Genome sequencing is used to identify viral variants and sub-lineages.
- The World Health Organization tracks emerging variants through genomic surveillance.
- COVID-19 symptoms often include fever, cough, sore throat, and fatigue.
COVID-19 Situation in Andhra Pradesh
Andhra Pradesh reported 19 COVID-19 cases between 26 June and 19 July 2026. Four recent deaths in the state involved patients with severe pre-existing comorbidities.
