This study is only made to confirm that an experimental vaccine might be the solution.

Viruses that replicate in the human respiratory mucosa without infecting systemically

That's an incorrect assumption based on the PCR tests that view any damaged cell as a potential virus cell.

cause significant mortality and morbidity

Based on what research? Only the Spanish Influenza? You would be surprised how many free passes this propaganda caused.

these viruses generally do not elicit complete and durable protective immunity by themselves

Based on what research? Again, a lot of assumptions that are used only to suggest that vaccines are the only solution.

effectively controlled by licensed or experimental vaccines

Shocking that they aim for "effective control"...

In this review, we examine challenges that have impeded development of effective mucosal respiratory vaccines

See? All focus is on the vaccine.

emphasizing that all of these viruses replicate extremely rapidly in the surface epithelium and are quickly transmitted to other hosts

Believe the science narrative... This has never been proven. Germ theory is a hoax that they pushed from before the wars. It was actually proven otherwise by sick people coughing and sneezing in healthy patients. None of them got sick.

within a narrow window of time before adaptive immune responses are fully marshaled

Their focus is on a fast vaccine, because "dangers". Same narrative.

possible approaches to developing next-generation vaccines against these viruses

Clearly they just push that from the start. Fake study to seemingly support the need for a "next generation vaccine".

Do I sum this up clear enough?