It's very nearly r/OrphanCrushingMachine

The current influenza vaccines are made by incubating the virus in fertilized chicken eggs. That step takes time. and hundreds of millions of eggs.

With mRNA vaccines, you can just throw templates, nucleotides, and enzymes into a container and get more mRNA for the vaccine (extremely oversimplified)

Influenza vaccines can't be frozen without having decreased efficacy. They have a narrow window of temps they can be stored in a refrigerator, and once room temperature, must be used within 72 hours.

Making influenza vaccines is something the world has experience and capacity to do (because we do it every year), however current techniques still have a bit of lag between identifying a novel strain and then development and mass manufacturing.

If we looking at the 2009 H1N1 outbreak, it took about 6 months to have a specific H1N1 vaccine approved and distributed after the first human cases.

With mRNA vaccines, which they are looking into for influenza, the turn around time may be significantly shorter.

Please read beyond the headline. This paper was studying clot prevention in a very specific patient population, those who had bone fractures in the lower extremity. It excluded pregnant patients, because almost all studies exclude pregnant patients.

Your wife taking LMWH is probably for a very different reason. Aspirin should be avoided in later pregnancy unless advised by your physician.

You've had continuous lower extremity fractures for 25 years?

This study is in line with previous studies comparing aspirin to LMWH in this specific population of orthopedic trauma.

This was a larger number enrolled and showed low dose aspirin is non-inferior to LMWH for all cause mortality. But LMWH had lower instances of DVT and PE.