Immunocompromised may need a fourth Covid-19 shot, CDC says
Updated 8:23 PM ET, Tue October 26, 2021
People with certain health conditions that make them moderately or severely immunocompromised may get a fourth mRNA Covid-19 shot, according to updated guidelines from the US Centers for Disease Control and Prevention.
The CDC authorized a third dose for certain immunocompromised people 18 and older in August. It said a third dose, rather than a booster -- the CDC makes a distinction between the two -- was necessary because the immunocompromised may not have had a complete immune response from the first two doses.
A study from Johns Hopkins University this summer showed that vaccinated immunocompromised people were 485 times more likely to end up in the hospital or die from Covid-19 compared to most vaccinated people. In small studies, the CDC said, fully vaccinated immunocompromised people accounted for about 44% of the breakthrough cases that required hospitalization. People who are immunocompromised are also more likely to transmit the virus to people who had close contact with them.
The US Food and Drug Administration has also authorized booster shots of all three available vaccines for certain people and that would include the immune compromised, the CDC says.
More: https://www.cnn.com/2021/10/26/health/covid-19-fourth-dose-for-the-immunocompromised/index.html
= new reply since forum marked as read
Thanks for posting. 
...unless some kind of pill or treatment becomes easily available.
I heard a couple of the members mention that about a 4th dose (and the one who explicitly said it was even surprised herself as she blurted it out 
).
I.e., for some severely immuno-compromised people, the vaccine course might need to be a "3-dose regular series" followed by a "4th dose" at some point, which caught my attention.
With Pfizer, all of their doses have been "full" which is why many of the members are trying to get the technical lingo reported correctly when talking "full dose". I.e., you would have a "2-dose primary series" followed by a "3rd (full) dose", making it a "3-dose series".
With Moderna, they actually have "full doses" and "half doses", where you would have a "2-dose primary series" followed by a "half dose booster".
For all intents and purposes, a "1-dose" shot of Janssen (J&J) or a "2-dose series" of either Pfizer or Moderna, would be considered "fully vaccinated", with any additional dosing being optional but not required for that designation of "fully vaccinated" (for travel or entry into facility purposes).
From CDC's meeting last week -
