Get ready to learn more Greek letters. Scientists warn that Omicron’s whirlwind advance practically ensures it won’t be the last version of the coronavirus to worry the world. 9News
. Experts don’t know what the next variants will look like or how they might shape the pandemic, but they say there’s no guarantee the sequels of Omicron will cause milder illness or that existing vaccines will work against them.They urge wider vaccination now, while today's shots still work.
Since it emerged in mid-November, omicron has raced across the globe like fire through dry grass. Research shows the variant is at least twice as contagious as delta and at least four times as contagious as the original version of the virus.who previously had COVID-19 and to cause “breakthrough infections” in vaccinated people while also attacking the unvaccinated. The World Health Organization reported a record 15 million new COVID-19 cases for the week of Jan.
It's a possibility, experts say, given that viruses don’t spread well if they kill their hosts very quickly. But viruses don’t always get less deadly over time. Getting progressively better at evading immunity helps a virus to survive over the long term. When SARS-CoV-2 first struck, no-one was immune. But infections and vaccines have conferred at least some immunity to much of the world, so the virus must adapt.Animals could potentially incubate and unleash new variants.
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