World may need to learn to live with coronavirus

Early in the pandemic, there was hope that the world would one day achieve herd immunity, the point when the coronavirus lacks enough hosts to spread easily. But more than a year later, the virus is crushing India with a fearsome second wave and surging in countries from Asia to Latin America. Experts now say it is changing too quickly, new more contagious variants are spreading too easily and vaccinations are happening too slowly for herd immunity to be within reach anytime soon.

That means if the virus continues to run rampant through much of the world, it is well on its way to becoming endemic, an ever-present threat.

Virus variants are tearing through places where people gather in large numbers

with few or no pandemic protocols, like wearing masks and distancing, according to Dr. David Heymann, a professor of infectious disease epidemiology at the London School of Hygiene and Tropical Medicine.

While the outbreak in India is capturing the most attention, Heymann said the pervasive reach of the virus means that the likelihood is growing that it will persist in most parts of the world.

As more people contract the virus, developing some level of immunity, and the pace of vaccinations accelerates, future outbreaks won’t be on the scale of those devastating India and Brazil, Heymann said. Smaller outbreaks that are less deadly

but a constant threat should be expected, Heymann said.

“This is the natural progression of many infections we have in humans, whether it is tuberculosis or HIV,” said

Heymann, a former member of the Epidemiology Intelligence Service at the Centers for Disease Control and Prevention and a former senior official at the World Health Organization. “They have become endemic and we have learned to live with them and we learn how to do risk assessments and how to protect those we want to protect.”

Vaccines that are highly effective against COVID were developed rapidly, but global distribution has been plodding and unequal. As rich countries hoard vaccine doses, poorer countries face big logistical challenges to distributing the doses they manage to get and vaccine hesitancy is an issue everywhere. And experts warn the world is getting vaccinated too slowly for there to be much hope of ever eliminating the virus.

Only two countries have fully vaccinated more than half of their populations, according to the Our World in Data project at the University of Oxford. They are Israel and the East African nation of the Seychelles, an archipelago with a population of fewer than 100,000. And just a handful of other countries have at least partially vaccinated nearly 50% or more, including Britain, tiny Bhutan, and the United States.

Less than 10% of India’s vast population is at least partly vaccinated, offering little check to its onslaught of infections.

In Africa, the figure is slightly more than 1%.

Still, public health experts say a relatively small number of countries, mostly island nations, have largely kept the virus under control and could continue keeping it at bay after vaccinating enough people.