With the arrival of the Delta variant, many people wondered if current vaccines lower the risk of spreading the virus to other people. This is the difference in “contagiousness” when comparing...

In the United States, the delta variant now accounts for over 99% of new infections. About half (54%) of the total population is now fully vaccinated. 63% of people in the U.S. have received at...

In addition to age, obesity is the main risk factor for poor outcomes from COVID-19 (hospitalization, need for critical care, death). We already know from earlier studies that certain vaccines, such...

Patients can now receive their COVID-19 vaccine and flu shot during the same visit. This is an updated recommendation by the Centers for Disease Control and Prevention. People with diabetes are at...

Clinical trials are the best way to prove the effectiveness of a vaccine. In a clinical trial, researchers have very specific criteria to select participants. However, inclusion and exclusion...

In response to the COVID-19 pandemic, many schools across the world have closed. As a result of school closures, there have been concerns about reduced educational opportunities, limited social...

The COVID-19 pandemic has created an “infodemic.” Each day, there is more and more information available about the virus and vaccines. While this provides valuable insights, all this information can...

All viruses change over time. These changes are called “mutations.” A virus with one or more new mutations is called a “variant” of the original virus. Most viral mutations have little to no impact...

We know that vaccines against COVID-19 work, but someone must pay for them. Both Pfizer and Moderna will make huge profits. Similarly, Astra Zeneca, with its much-publicized “non-profit” model, will...

In the United States (U.S.), health officials recently announced that they will start offering COVID-19 vaccine booster shots to the general public beginning the third week of September 2021. The...

The Delta variant, the highly transmissible version of the virus that causes COVID-19, currently makes up almost all new cases in the United States. Some of those infections have been reported in...

We know that antibodies from natural infection may provide some protection against COVID-19. However, evidence shows nothing protects against COVID-19 better than vaccines. Previous studies have...