COVID-19 second wave continues to grow

A booster shot of COVID-19 vaccine is now officially recommended for people with seriously compromised immune systems, representing around 3% of the adult population of the United States.

According to the Centers for Disease Control (CDC), these groups are especially vulnerable because they are at more risk of severe, prolonged illness and emerging data suggests they do not always build up the same level of immunity as people who are not immunocompromised.

Small studies have also suggested that fully vaccinated but immunocompromised people have accounted for a significant proportion of ho...