I am trying to understand this statement about the Measles part of the MMR (Mumps, Measles and Rubella) vaccine
Measles prevention: MMR (AB protect during primary and secondary viremia)
Measles enters from respiratory tract, through mucosa of the upper respiratory tract. The virus passes into cervical lymph nodes. Now, starts first viremia (MMR somehow helping here) which lasts about 5 days. Then antibodies are secreted during 15 days which leads to rash lasting about 3 days.
I think this second viremia refers to the possible dissemination of the virus to other lymph nodes by blood. This suggests me that the vaccine primarily have a mechanism that affects in the lymph nodes or generally in the lymphatic circulation.
How MMR vaccine affect lymph nodes in preventing measles?