Several strains have been identified and monitored closely:
- Alpha (B.1.1.7): First identified in the UK, it is more transmissible. - Beta (B.1.351): Emerged in South Africa, known for partially evading immune responses. - Gamma (P.1): Found in Brazil, it has mutations that may affect antibody neutralization. - Delta (B.1.617.2): Originated in India, highly transmissible and more severe.
