Blood tests aren’t always accurate right after contracting an infection. It can take three to six months after exposure to get a positive blood test. This is why it is important to repeat testing.

The AST blood test is straightforward and similar to any other blood test. A healthcare professional may take the following steps: An AST blood test will usually only take a few minutes in total.

This tumor DNA, also known as circulating tumor DNA (ctDNA), is released by cancer cells into the bloodstream. Tracking ctDNA ...