Easier than a blood test, saliva tests have the potential to detect cavities, infections and even cancer. But a lack of insurance coverage and other obstacles stand in the way of wider use.
The saliva circulating in your mouth contains troves of microbial information about the rest of your body and is easier to collect than blood samples. Today, a few drops of spit can help detect viruses like HIV and the one that causes COVID-19, or as... [4415 chars]