New YorkThe delta variant of the coronavirus is the most contagious mutation so far in the pandemic, but vaccines against the virus that causes Covid-19 still offer strong protection against it. Almost all hospitalizations and deaths from Covid-19 occurring today have been in unvaccinated people.

However, recent research suggests that those who have been vaccinated can develop the delta variant. And although they are unlikely to become seriously ill, they can pass it on to other people.

The U.S. Centers for Disease Control and Prevention (CDC) indicated a high delta variable by asking fully vaccinated people to return to wearing masks indoors in areas of the country where there is currently a high rate of infection.

The new guidelines help protect those who haven’t been vaccinated, including children and others at risk of developing serious illness if they become infected.

Scientists have predicted that some vaccinated people will get sick from Covid-19, but show mild or no symptoms, as the vaccines are designed to prevent those vaccinated from becoming seriously ill. The CDC no longer counts these publicly vaccinated cases, but the Kaiser Family Foundation’s analysis of data from countless countries found that they make up a small portion of all Covid-19 infections.

It is not yet clear if the delta variant is able to make people sicker, but experts say it spreads more easily due to mutations that make it stick better to cells in the human body.

The variant, which was first discovered in India, quickly became the dominant mutation all over the world, including the United States.

Viruses are constantly evolving and most changes are not alarming, but scientists are concerned that uncontrolled spread could create more mutations and produce a more contagious variant, causing people to become more seriously ill, or might evade the protection provided by the current. Vaccines.

That’s why experts say it’s important for vaccines to be universally available and stress the importance of completing the vaccination schedule.