... a new study underscored the importance of vaccinating more people as it detailed how some of those who had Covid-19 can suffer from symptoms months later.
Immunity to the coronavirus lasts at least a year, possibly a lifetime, improving over time especially after vaccination, according to two new studies. The findings may help put to rest lingering fears that protection against the virus will be short-lived.
Together, the studies suggest that most people who have recovered from Covid-19 and who were later immunized will not need boosters. Vaccinated people who were never infected most likely will need the shots, however, as will a minority who were infected but did not produce a robust immune response.
Two new studies reveal that although COVID-19 vaccine hesitancy has declined in the United States, 35.2% of adults 18 to 39 years and 8.7% of those 65 and older still said they would not partake as of March 2021 and November 2020, respectively.
Over and over, the pandemic has reinforced the reality of racial disparities in the U.S. health system. But that story remains difficult to see in the data, which is still inconsistently collected and reported across the country.
For the first time in six weeks, India has registered fewer than 200,000 coronavirus infections over a 24-hour period, according to a Health Ministry update on Tuesday.
No vaccine provides perfect protection, and so-called breakthrough infections after coronavirus vaccination are rare and unlikely to lead to serious illness. Federal health officials have told fully vaccinated people they no longer need to wear masks or maintain social distance because they are protected, nor do they need to be tested or quarantine after an exposure, unless they develop symptoms.
Now, the Centers for Disease Control and Prevention has stopped investigating breakthrough infections among fully vaccinated people unless they become so sick that they are hospitalized or die.
Half of all American adults are officially fully vaccinated against COVID-19, according to Centers for Disease Control and Prevention (CDC) data, marking significant progress since the vaccines were first authorized in December.
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