A cell that carries out the final response or function of a particular process. The main effector cells of the immune system, for example, are activated lymphocytes and phagocytesâthe cells involved in destroying pathogens and removing them from the body.
Best Answer: Yes you can track it online here: https://tools.usps.com/go/TrackConfirmAc... The tracking number should look like this: CP 000 000 000 US. You can find it on the receipt, and the customs form you filled out.
The USPS agency provides various services for the customers of the United States. All the services are provided by entering the 35 digit tracking number separated by commas and then the guidelines direct you to the prescribed stream. Also, Check Why My USPS Certified Mail Tracking Details are Not Updating.