Measles in the US is generally confined to imported cases, cases where unvaccinated individuals are exposed to imported cases, and outbreaks where communities that are not vaccinated (usually for religious reasons) are exposed. SSPE has not occurred significantly there since the advent of measles vaccine in the 1960s.
Here's a synopsis of the first study mentioned in the link.
"Using genetic analysis, the researchers demonstrated that only wild-type measles virus strains caused these cases of SSPE.
The researchers found an incidence off SSPE of 22 per 100,000 cases of measles; adjusting for under-reporting they estimated that the incidence of SSPE was likely to be between 7 and 11 cases per 100,000 cases of measles." This is the only study in the vaccineinjury that supports any conclusion whatsoever, and it is the opposite of what the vaccineinjury author wants to suggest. 'There is no way to make this consistent with the idea that measles containing vaccine cause SSPE.' Yes to this.
From this study, not mentioned in the link -- 'Measles virus (MV) is an important human pathogen that induces a generalized transient immune suppression that accounts for most of the mortality associated with measles as well as a specific immune response that provides life-long protection (41). This paradoxical effect is most likely due to early interactions of MV with cells of the immune system, including conventional and plasmacytoid dendritic cells (cDC and pDC). Manifold functions of DCs are compromised by MV infection, which is proposed to contribute to immune suppression (19). A particularly remarkable feature of MV is the ability to shut down IFNα production in response to TLR7 and TLR9 ligands in infected human pDC in vitro, as we could show previously (48).'
The vaccineinjury article suggests that other viruses also contribute to suppression of the immune response before exposure to MV.
The Th1/Th2 article mentioned in the link basically speculated that Th2 biased response to the vaccination might not confer lasting immunity and didn't proceed even to speculate about transition from Th1 to Th2 transition. (I think a slightly different interpretation of this article was reached by the vaccineinjury author).
Paragraph 6, beginning 'Wakefield and Co', is speculation based on the discredited theories of Andrew Wakefield (see 'The Crash and Burn of an Autism Guru' article from the New York Times). In a nutshell -- 'his belief, based on a paper he wrote about 12 children, is that the three vaccines {MMR}, given together, can alter a child?s immune system, allowing the measles virus in the vaccine to infiltrate the intestines; certain proteins, escaping from the intestines, could then reach and harm neurons in the brain.'
Par. 7, ('When considering at which point...') arising from Par. 6, is based on the same speculation. 'This could be the reason why it would be better not to vaccinate against the measles but at least not to vaccinate MMR.' This is a highly dubious conclusion therefore.
Paragraph 8, with the link to a study in Africa draws a conclusion that is not warranted by the study imo.
What I find interesting about the article is that it shows the danger of not checking your sources very carefully before citing them, because the conclusions the author drew are not supported by all of the studies he cited. A parent scanning the internet for information on a child's malaise might be taken in by the appearance of serious and reasonable science-based conclusions in an article like this, and that is sad.