CNN: The threat of the Delta variant has some health officials rethinking Covid-19 measures, even among vaccinated people.
Experts have said vaccines like those from Moderna and Pfizer/BioNTech provide high amounts of protection against the variant, but some warn breakthroughs could become more likely if the virus becomes more prevalent.
Already in Los Angeles County, officials have reinstated mask guidance for public indoor spaces, regardless of vaccination status. Other parts of the world are getting even stricter.
South Africa has entered at least two weeks of lockdown to combat a third wave of Covid-19 linked to the Delta variant.
About 10 million Australians, including residents in four of the country’s eight capital cities, are also under lockdown.
The variant is expected to become the dominant coronavirus strain in the US, the director of the Centers for Disease Control and Prevention said. And with half the US still not fully vaccinated, doctors say it could cause a resurgence of Covid-19 in the fall — just as children too young to get vaccinated go back to school.
The spread of coronavirus is outpacing vaccinations, the World Health Organization said. And the longer coronavirus spreads among unvaccinated people, the more opportunities it has to mutate into more troubling variants.