XBB.1.16: Big jump in Singapore – suddenly outcompetes XBB.1.9.1 – *2 Updates*

Coronavirus, Genome, Singapore, Testing, Transmission, XBB.1.16

BREAKING: Singapore has seen an unexpectedly large rise in the XBB.1.16 variant of Omicron.

The data, from CovSpectrum, shows that XBB.1.16 has risen from just 1% of sequences to over 23% of sequences in just ELEVEN DAYS.

XBB.1.16 is the variant that has seen extraordinary growth in India in the past few weeks.

CovSpectrum: XBB.1.16 v XBB.1.9.1 v XBB.1.5 in Singapore


XBB.1.16 in India:


Raj Rajnarayanan – XBB.1.16 will outcomepete XBB.1.9.1:


Vipin Vashishta on XBB.1.16 in India:




The Hindustan Times:

Hindustan Times – XBB.1.16 driving a fresh Covid-19 spike in Maharashtra


UPDATE 1 – 3rd April 2023 – There’s no doubt that XBB.1.16 has easily outcompeted XBB.1.9.1 in Singapore

And it looks fit enough to outcompete XBB.1.5 too…



UPDATE 2 – 3rd April 2023 – XBB.1.16 at 42% of sequences in Nepal



We will update this thread as more information becomes available, or follow us on Twitter for regular updates



XBB.1.9.1 now the dominant Covid variant in Singapore



** This post was originally published on March 28, 2023 **