What you need to know about COVID-19 variants
Leonor Soberanis, an employee at Ferrara Candy, receives her Moderna COVID-19 vaccine from nurse Trevon Harvy on April 15, 2021, in Chicago. - Antonio Perez/TNS

So far, roughly 213 million COVID-19 vaccines have been administered in the United States, with more than a quarter of the nation fully vaccinated. The virus is still spreading, with cases rising in many parts of the country. Each time the virus transmits is another opportunity for a mutation to occur, potentially creating a new — and possibly more problematic — strain of the virus. The Biden administration recently allocated $1.7 billion to fight these troubling variants. Earlier this month, Rush University Medical Center in Chicago launched an advanced molecular lab dedicated to monitoring a...