XBB.1.9.1 now the dominant Covid variant in Singapore

Asia, Coronavirus, Genome, Hospitalization, Infection, Omicron, Recombinants, Singapore, Testing, Transmission, XBB.1.9.1

New Covid sequencing data shows that the XBB.1.9.1 variant now outcompetes XBB.1.5 in Singapore.

As you can see  in the chart above, based on the most recent data from GISAID, XBB.1.9.1 is now found in 28% of sequences in Singapore, compared to just 12% for XBB.1.5.  That is nearly three times the amount of XBB.1.9.1 sequences that we noted from Singapore, based on data from the 20th February 2023.

We posted the chart below on Twitter two days ago. It was based on GISAID date from the 20th February 2023. You can see, at that point, XBB.1.9.1 was found in just 10% of SARS-CoV-2 sequences.

Coronaheadsup on Twitter – XBB.1.9.1 in Singapore


We also posted the following Tweets three days ago about the latest Covid case and hospitalization data for Singapore:

Singapore COVID Cases:


Singapore COVID hospitalizations:


Singapore COVID ICU admissions:

Singapore Ministry of Health Covid-19 data


There seems to be a similar battle between XBB.1.9.1 and XBB.1.5 being played out in Indonesia. In both Indonesia and Singapore, XBB.1.9.1 is already the clear winner




We will be updating this post as more news becomes available about the XBB.1.9.1 outbreak in Singapore.


Follow Coronaheadsup on Twitter for the latest breaking Covid news.   Our Twitter account is still heavily suppressed by authorities around the globe, so even if you follow us, you may not see our tweets. Check back here regularly for all of our free content.



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** This post was originally published on March 20, 2023 **