Breakthrough!

I just got an email from an agent that I queried a couple of days ago requesting my full manuscript! I'm so excited and I'm just hoping and praying that she likes it. Just wanted to let you all know and I'll keep you posted with any new updates.

Also a question. Now that I have sent my full manuscript to an agent, do I have to let the other agents that I've queried know?  Can I still query other agents as well? I don't know what the etiquette is in this situation.