New Delhi: A new Covid-19 subvariant known as BA.3.2, nicknamed ‘Cicada’, is gaining ground across the United States. According to the US Centres for Disease Control and Prevention or CDC, the strain has been detected in at least 25 states, and cases are rising nationwide. First identified in South Africa in late 2024, BA.3.2 began spreading more widely in 2025 and has now been reported in over 20 countries, as noted by the New York Post. The subvariant descends from the Omicron lineage that emerged in late 2021.
Reports indicate it carries around 70 to 75 mutations in its spike protein, raising questions about immune response and vaccine performance. Despite the rapid spread, a doctor told The Independent there is no immediate reason for alarm, adding that current evidence does not suggest more severe illness compared to strains seen during winter 2025-2026.
BA.3.2 ‘Cicada’ symptoms and health guidance
Common symptoms reported
Health experts state that signs linked to BA.3.2 remain similar to earlier Omicron strains. Frequently reported symptoms include sore throat, dry cough, fatigue, body aches, fever, chills and headache. Some individuals may notice mild breathing difficulty or gastrointestinal issues such as nausea, according to the CDC. Most infections appear mild to moderate, particularly among vaccinated people, and resemble a seasonal flu-like illness.
Vaccine effectiveness and spike mutations
The spike protein, which allows the virus to enter human cells, is also the primary target used by vaccines to train immune defence. With 70 to 75 mutations identified in this region, specialists suggest current Covid-19 vaccines may offer reduced protection against infection. At present, vaccines in use were designed to guard against JN strains, which have remained dominant in the United States since January 2024 and belong to the same lineage.
Precautionary measures to follow
Public health advice remains consistent. Wash hands thoroughly, especially before meals or after contact with unwell individuals. If symptoms develop, stay at home, rest and avoid close contact with others. Seek medical advice if discomfort continues or worsens.
While BA.3.2 ‘Cicada’ is spreading, experts stress vigilance rather than panic, with focus on sensible precautions and updated health guidance.