COVID vaccines lost some effectiveness in delta surge, ongoing CDC study finds
By
Alicia Lasek
Aug 25, 2021
The three federally sanctioned COVID vaccines have lost a “moderate” amount of effectiveness against SARS-CoV-19 ever since the delta gene variant became the predominant U.S. strain, the agency reports.
Immune system boost is reason not to skip second COVID-19 shot, study finds
By
Liza Berger
Jul 20, 2021
The second dose of a COVID-19 vaccine offers a serious boost to a part of the immune system that provides broad antiviral protection, according to a Stanford University School of Medicine study. This finding...
Feds gauging threat to vaccine, test and treatment efficacy in face of omicron variant
By
Alicia Lasek
Dec 01, 2021
The United States is prepared to address any potential threat to the effectiveness of COVID-19 vaccines, tests and treatments posed by the new variant, according to the White House and federal health officials.
Infection control experts throw support behind healthcare vaccine mandates
By
Alicia Lasek
Jul 01, 2021
Voluntary vaccination policies are not a sure path to herd immunity in healthcare facilities, APIC says. The infection control advocate has endorsed vaccine mandates as a condition of employment.
The COVID race: Vaccines 90% effective in frontline workers, but variant cases rising
By
Alicia Lasek
Mar 30, 2021
The pace of U.S. vaccinations must hold up against the effects of spreading virus variants to keep further outbreaks under control, according to the CDC and expert observers.
J&J vaccine effective against COVID Delta variant, drugmaker says
By
Alicia Lasek
Jul 06, 2021
Johnson & Johnson’s single-shot COVID-19 vaccine prompts a “strong neutralizing antibody response” that lasts at least eight months, the drugmaker has announced.
Feds wait for lowered vaccine efficacy to recommend COVID-19 booster shots
By
Alicia Lasek
Jul 22, 2021
COVID-19 vaccine booster shots will not be necessary until mRNA vaccines become less effective, federal health officials say. But immunocompromised Americans are potential near-term recipients, they told...
Study: Updated COVID vaccine is 71 percent effective against hospitalization for older adults
By
Kristen Fischer
Jan 09, 2024
A new study exploring how well the updated COVID-19 vaccines worked in people over the age of 60 had some promising results.
Long-term care residents, staff may top list for COVID boosters: CDC advisers
By
Alicia Lasek
Jun 28, 2021
Most residents were vaccinated early, and time from vaccination plays into waning effectiveness, CDC advisers say. What’s more, this population already requires special considerations for other vaccines....
CDC says COVID-19 vaccine boosters not yet necessary, while Pfizer seeks approval for third dose
By
Alicia Lasek
Jul 12, 2021
Fully vaccinated Americans do not need a COVID-19 booster shot at this time, according to federal health officials. But Pfizer has asked to offer a third dose of its current vaccine and is developing an...