There are a number of panicky Facebook posts, to which I will not link, going around about the "shocking" discovery that #mRNA #vaccines cross the #placental barrier. Which really shouldn't be a surprise to anyone, but #antivaxers gonna #antivax.

Okay, the discovery is real enough. Here's a direct link: https://www.sciencedirect.com/science/article/pii/S2162253125000435 Click the "View PDF" button at the top, just above the journal title, to read the full article. Note that this is a pre-print version, meaning there may be some typos and such, but nothing that's likely to change the results.

The problem is ... well, there's no problem here! #Maternal #immunity, however acquired, is routinely passed on to #fetuses: we're all born with #immune systems primed to deal with whatever #diseases our mothers have encountered, and that's a *good thing*.

Of course antivaxers who freak out about any occurrence of the abbreviation "mRNA," like the same people often freak out about the word "pronoun" or the "cis-" and "trans-" prefixes, think this is somehow evil.

It's not. It means *fewer dead kids*. These people would literally rather kill their children than learn anything that contradicts their ideology.