Between 70 and 75 spike-protein changes: that is the figure scientists keep returning to when they describe BA.3.2, an Omicron subvariant that South African scientists first spotted in November 2024. Most vaccines train the body to recognise the spike, so a lineage that has rewritten so much of it draws attention.
It did not stay in South Africa. IBTimes UK counted detections in at least 23 countries, and HuffPost said it makes up 30% of Covid cases in some European regions. The News International, citing US figures, put its reach at 29 US states and Puerto Rico, with continued growth in parts of Europe. The World Health Organization has classified it as a variant under monitoring.
Small in the US, for now
Numbers in America remain modest. Dr. Abraar Karan of Stanford University School of Medicine told HuffPost that BA.3.2 makes up less than 1% of cases there, and that the current dominant strain is XFG. Wastewater tells part of the story. Epidemiologist Dr. Syra Madad said detection across multiple states “suggests low-level spread, but it has not emerged as the dominant variant.”
IBTimes UK traced the first US detection to a traveller arriving from the Netherlands, picked up through a genomic surveillance programme. Wastewater monitoring and clinical samples have added to the count since.
What the mutations might do
Madad said officials are watching the variant closely because of its large number of spike mutations, which “may help it partially evade immunity from prior infection or vaccination.” Early laboratory work cited by IBTimes UK points to a strong ability to dodge antibodies, including those produced by current vaccines. That raises the odds of breakthrough infections.
Dodging antibodies is not the same as causing worse illness. Madad said there is so far no evidence of more severe illness across a population. Karan was more cautious on the open question: “We’re still going to have to wait and see whether or not this variant causes more severe disease.”
Experts quoted by The News, including Dr. Jake Scott and Marc Veldhoen, stress that immune memory from vaccines and past infection continues to protect against severe disease. One quirk in the data deserves a caveat. BA.3.2 shows up more often in paediatric sequencing, but they warn against concluding it prefers children. Children are more likely to be tested and sequenced in a clinical setting, and they have had less cumulative exposure to earlier variants.
Symptoms, according to Karan, look much like those of recent years: runny noses, sneezing, headaches and body aches rather than pneumonia.
Sources
- What To Know About BA.3.2, The Highly Mutated COVID Variant Spreading Through The World Right Now – Yahoo Life UK
- A New COVID Variant Is Spreading—How Worried Should You Be About BA.3.2? | IBTimes UK
- New Covid variant BA.3.2 spreads across US as experts stress vigilance
