1. D614G mutation
This mutation emerged in China in January/February 2020. This was the dominant form of SARS-CoV-2 that affected the world. It was different in its infectivity and transmission.
2. Cluster 5
Cluster 5 dominated Denmark in August and September 2020. According to Danish authorities, this type of mutation was not seen or recorded previously.
3. SARS-CoV-2 VOC 202012/01
The UK variant emerged in December 2020. It first appeared in South East England and spread throughout London. The mutant had more chances of transmissibility due to the increased number of proteins.
This mutation occurred in South Africa. It was the same mutation that was also found in the UK variant. It also had the same spike in protein, which increased its transmissibility.