Human endogenous retroviruses (HERVs) are traces of ancient viruses present in the human genome, having first integrated themselves into our makeup millions of years ago, after infecting a common ancestor. They comprise a significant part of the our genome, making up about 8% of our DNA.

There aren't many HERVs that can still be read & expressed by the body, but there's one that can: HERV-W.

HERV-W has been functionally adopted by its human host, meaning the body has learned to make use of this viral code. There's not a single tissue in the body where it's not found; it's expressed in the brain, testis, ovaries, spleen, thymus, placenta (ESPECIALLY in the placenta), and more.

In the placenta, humans have come to rely on the envelope protein (outer skin) code of the HERV-W virus, which is used to form the 'syncytiotrophoblast'; a layer in the wall of the uterus which feeds the embryo with nutrients from the mother.

HERV-W ENV is highly expressed in the white blood cells of COVID-19 patients but not in those of healthy donors:

https://www.thelancet.com/journals/ebiom/article/PIIS2352-3964(21)00134-1/fulltext https://www.bloomberg.com/press-releases/2021-04-15/geneuro-researchers-detect-herv-w-env-in-covid-19-patients-and-link-expression-to-disease-severity

Why is this?

Because despite factually incorrect "debunkings", sequence motifs of SARS-CoV-2 clearly show high similarity to HERV-W. The alignments show that the S-CoV-2 spike protein & the envelope protein of HERV-W (also called syncytin-1) are directly related to one another.

The "debunkings" either try to debunk made-up claims of HERV-W itself being present in the vaccine, or feature Pfizer spokespeople purposefully employing straightforward sequence comparisons, which is NOT where the similarity lies; the parity is between sections of the β-pleated sheet:

https://virological.org/t/response-to-ncov2019-against-backdrop-of-endogenous-retroviruses/396

What are the effects of this?

The majority of the vaccines confer immunity based on an ability to recognise the covid spike glycoprotein, the spike protein's beta sheet comforms to that of HERV-W; thus, every tissue where HERV-W is expressed in the body will now be targeted by the white blood cells expressing HERV-W, as mentioned above in The Lancet. Think hard about where the side-effects of the vaccine are located in the body; blindness, bizarre menstruation, bloodclots, headaches, heart attack, vascular inflammation: in each of these places you will find HERV-W being utilised by the body.

Now with that knowledge read this carefully:

“The placentas look completely burnt out, just incredibly necrotic and damaged"

“There’s a very abnormal appearance to the surface of the placenta when it is cut for examination, with white streaks and nodules occupying large portions of the placental disk. It is a very uncommon finding that we would rarely see in routine practice."

https://www.the-scientist.com/news-opinion/doctors-investigate-several-stillbirths-among-moms-with-covid-19-68703

Doctors are also concerned about this:

https://bjgplife.com/2020/05/21/of-hervs-and-covid-19-questions-for-the-future/

"is that why COVID-19 has adverse effects on pregnancy and child birth?"