Research Shows High Effectiveness of Mix-and-Match COVID-19 Vaccines

  People who had received a first dose of the Oxford-AstraZeneca COVID-19 vaccine and received an mRNA vaccine for their second dose had a lower risk of infection compared to people who had received both doses of the Oxford-AstraZeneca vaccine. This is shown in a nationwide study performed by researchers at Umeå University, Sweden. “Having … Read more

Some Popular Sunscreens Lose Effectiveness and Become Harmful During Sun Exposure

During use, some sunscreens offer very limited protection against dangerous sunrays and may even be harmful. Chemical reactions involving a main ingredient — zinc oxide — mean many sunscreens become ineffective after just two hours of sun exposure, according to a new collaborative study between the University of Leeds, the University of Oregon, and Oregon … Read more

Sunscreen That Includes Zinc Oxide Loses Effectiveness and Becomes Toxic After 2 Hours

Sunscreen that includes zinc oxide, a common ingredient, loses much of its effectiveness and becomes toxic after two hours of exposure to ultraviolet radiation, according to a collaboration that included Oregon State University scientists. The toxicity analysis involved zebrafish, which share a remarkable similarity to humans at the molecular, genetic and cellular levels, meaning many … Read more

Study: Pfizer Vaccine’s Effectiveness Against Infection Fades at 6 Months

The data released this week that helped convince the Food and Drug Administration to recommend a booster shot for Pfizer-BioNTech vaccine recipients also confirmed the extraordinary effectiveness of the initial two-dose regimen at preventing hospitalization and death. The study, published in The Lancet medical journal, found the vaccine’s effectiveness at preventing COVID-19 dropped to 47 … Read more

Pfizer COVID-19 vaccine effectiveness drops 6 months after 2nd dose: study – National

The effectiveness of the Pfizer Inc/BioNTech SE vaccine in preventing infection by the coronavirus dropped to 47% from 88% six months after the second dose, according to data published on Monday that U.S. health agencies considered when deciding on the need for booster shots. The data, which was published in the Lancet medical journal, … Read more

Researchers Show Homemade COVID Face Masks Work – Effectiveness Varies Depending on Design

Penetration and atomization of cough droplets through single layer homemade mask fabrics. Credit: Bal Krishan Triple-layer cotton towel fabric masks shown most efficient for blocking aerosolized virus. Since the spread of virus causing COVID-19 continues, experts recommended wearing homemade facemasks when surgical or N95 masks are not available to prevent the spread of the pandemic. … Read more

Breakthrough Infections and Boosters No Reason to Doubt COVID Vaccine Effectiveness

COVID-19 breakthrough infections and the need for booster shots are not signs that coronavirus vaccines don’t work, according to Hartford HealthCare (HHC) experts. Dr. Ulysses Wu, HHC director of infectious disease, said success is not just measured in preventing the disease. “It’s about protecting those who get the disease to make the illness less severe,’ … Read more

New CDC studies show waning vaccine effectiveness against hospitalization in elderly

Their release comes as the Biden administration is grappling with how to blunt the surge of cases driven by the highly contagious Delta variant as schools and offices reopen, travel increases and cooler weather sends people inside. In a speech on Thursday, President Joe Biden made his strongest push yet to get Americans vaccinated against … Read more