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.
And here are some reasons that other US Postal Service (USPS) customers called 800-275-8777 recently:  1 item did not arrived yet but scanned already as deliveredGetHuman-joevilp12d agoLetter carrier nameGetHuman-laurenmi17d agoneed to unsubscribe from usps tracking emailsGetHuman5406019d ago.