Stream on the PBS app. | PBS

With the PBS Video app, you can stream the best of PBS — anytime you want, anywhere you are. Learn more: https://to.pbs.org/2WUGBTn | PBS

With PBS Passport, get extended access to your favorite PBS programs – anytime, anywhere! Binge, catch up, and rewatch your favorites. Learn more: pbs.org/getpassport📱💻📺 | NWPB

Perfect Blood Smear & Staining Guide Approximately 10 µl of whole blood, after the blood smear is prepared, place it in a well-ventilated area to dry for later use. Pay attention to the following points when staining: 1. The blood smear must be completely dry before starting the staining process. 2. The slide should be placed horizontally, evenly sprinkle 0.5 ml of Solution A and 1 ml of Solution B over the entire slide, use a rubber bulb to ensure thorough mixing and stain for 4 minutes (6–7 mi