A number of recent studies have focused on COVID-19 vaccine efficacy, hospitalization trends and variants.
Here are 15 findings from studies published since March 3:
1. Pfizer said March 11 that its COVID-19 vaccine prevented 94 percent of asymptomatic cases, according to an Israeli study.
2. Novavax's COVID-19 vaccine candidate was 96.4 percent effective in preventing COVID-19 in its phase 3 U.K. trial, the drugmaker announced March 11.
3. Eli Lilly said March 10 its COVID-19 antibody cocktail reduced the risk of hospitalization and death by 87 percent during a recent phase 3 study.
4. GlaxoSmithKline and Vir Biotechnology said March 10 that their COVID-19 antibody drug was 85 percent effective at reducing virus-related hospitalizations and death in a phase 3 clinical trial.
5. Despite few hospitalized COVID-19 patients having a bacterial infection, 52 percent of hospitalizations led to at least one antibiotic prescription, according to the Pew Charitable Trusts' Antibiotic Resistance Project published March 10.
6. People who have more than five symptoms of COVID-19 during the first week of illness may be more likely to develop prolonged health issues, known as "long COVID-19," according to a study published March 10 in Nature Medicine.
7. Patients ages 30 and older infected with the U.K. coronavirus variant had a 64 percent higher death risk than those infected with previously circulating strains, according to a U.K. study published March 10 in The BMJ.
8. People who received both doses of Pfizer-BioNTech's messenger RNA vaccine and had no symptoms had an 80 percent lower risk of testing positive for COVID-19 compared to those who were unvaccinated, according to research published March 10 in Clinical Infectious Diseases. The findings suggest mRNA vaccines are effective at reducing the risk of asymptomatic infection.
9. Among 71,491 U.S. adults who were hospitalized with COVID-19, 27.8 percent were overweight and 50.2 percent were obese, according to the CDC's latest Morbidity and Mortality Weekly Report published March 8.
10. Just 0.025 percent of staff from Massachusetts General Hospital and Brigham and Women's Hospital experienced anaphylaxis after receiving Pfizer or Moderna COVID-19 vaccines, according to a study published March 8 in JAMA.
11. The COVID-19 vaccine developed by Pfizer and BioNTech was shown to be 95 percent effective in neutralizing a more contagious variant of the novel coronavirus that was discovered in Brazil, according to a study published March 8 in the New England Journal of Medicine.
12. Both Pfizer's and Moderna's COVID-19 vaccines were at least 10 times less effective against a virus variant first found in South Africa in a small study conducted by researchers from Columbia University, Business Insider reported March 8.
13. In-hospital mortality for COVID-19 patients fell 15 percentage points from March to August 2020, according to a study published March 5 in JAMA Network Open.
14. Among 152 children hospitalized with COVID-19, 18, or 12 percent, developed acute kidney injury, according to a study published March 3 in Kidney International.
15. The SARS-CoV-2 virus may more easily bind to the airway cells of people with Type A blood, according to a study published March 3 in Blood Advances.