In Brazil, two cases have been reported recently in which the affected persons were infected by two Corona virus variants at the same time.
Although the two individuals were only mildly ill (both in their 30s), scientists are concerned. Besides the Brazilian variant (B.1.1.7), once B.1.1.248 (Brazilian/Japanese variant) and once B.1.91 (Portuguese variant) were found. The reason for concern is that – if several variants spread simultaneously in an infected person – even more, possibly even more dangerous mutations could form, or the emergence of such new mutations could occur even faster than before.
More: Reuters article