Abstract: Additional
spike mutations were rarely documented with the exception of mutation
S:
Q613H which has been detected in several genomes (n = 25) since July 2021.
Result: Of note, since July 2021, mutation
S:
Q613H present in lineage A.23.1 has been detected in a relative high number of genomes belonging to the P.1 (n = 1) and B.1.617.2/AY.X (n = 24) lineages, mutation which could provide some biological advantages.
Discussion: Nevertheless, in late weeks, the additional
spike substitution
S:
Q613H has been detected in an increasing number of genomes belonging to the Delta variant.