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There is thought there could be even new mutations. >> it looks like that bay. we know of ba.1 and ba.2, there's all these numbers, there's ba.2.12.1, there is two more that are starting to circulate in south africa pretty significantly and they are no doubt going to come here. we have to assume when we see these things happening in other places around the world, viruses don't -- they cross borders, they don't discriminate in this way. take a look at what's happening in south africa, this is what gave us the clue about omicron in the first place, going back to the end of last year. saw that, o...

You may be at risk of catching new COVID subvariants BA.4 or BA.5 even if you had the original omicron, as virologist Alex Sigal told DW's Science Unscripted.

People who've already had the original omicron can also be infected by the latest mutations of the variant, B.A.4 and B.A.5.

The variant, which has been detected in very small numbers in the U.S., is a mixture of the Omicron BA.1 and BA.2 types.

Restrictions. the mental health damage. the depression. the anxiety, the substance abuse. >> bret: last thing really quickly. you know, we hear other things, other subvariants that are, you know, popping up. but nothing is on the board right now that suggests that we're going to have to reverse where we are heading, right? >> absolutely not. the ba 2 vary divlant we are all talking about in south africa, 86% of the cases. no skyrocketing of cases. what science is showing about that subvariant is that it spreads more rapidly but it doesn't get you more sick. so in an area like the united states...