Can you prevent RSV??

We visited family last night and now today my SIL tells me that my nephew has RSV. He spiked a fever last night and she took him to the doctor.

Now I’m hysterically crying and praying my 6 week old doesn’t get it. He’s been sleeping all day like literally has ate and gone right back to sleep the whole day. I am terrified. My niece had it at his age and still has problems from it at 8 years old.