It's been almost three years since COVID—19 began spreading around the world. There have been more than 400 million cases of the virus around the world. At least 6. 15 million people have died.
After scientists developed vaccines(疫苗) that worked against the virus, many countries began to pay attention to vaccination programs. The vaccines are great tools for fighting the virus yet.
One reason is that many poorer countries are struggling to get vaccines for their people. Our country has given away hundreds of millions of vaccines to those countries, but billions more are needed.
In some countries with strong vaccination programs, many people refuse to get vaccinated. Many of these people have gotten wrong information and may not be safe.
Finally, coronavirus "variants(变异)" are making it harder to beat the virus. Now the" Delta variant and Omicron variant seem to be the worst. They spread quickly and may cause more serious illnesses.
The two variants are causing terrible problems in countries where people haven't had the chance to get vaccinated. Even in countries with plenty of vaccines, the variants are having a strong influence on unvaccinated people.
It's clear that COVID-19 will be part of people's life for quite a while. The best way to fight it seems to vaccinate as many people as possible.
