So far, there are mainly four known virus mutations. These are Alpha (B1.1.7), which was first detected in the UK in September 2020, Beta (B1.351), which was first detected in South Africa at the end of 2020, Gamma (P.1), which was first detected in Brazil and Delta (B1.617.2), which was first detected in India.
Source: https://www.rki.de/DE/Content/InfAZ/N/Neuartiges_Coronavirus/Virusvariante.html;jsessionid=F0C7853CA92810DA6FC3317FD14575B6.internet121?nn=2444038
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