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Sunday, October 24, 2021
The immune system and COVID: It’s still confusing

The immune system and COVID: It’s still confusing

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Enlarge / SOUTH TANGERANG, INDONESIA - JANUARY 7, 2021: A patient recovered from COVID-19 donates plasma at Indonesia Red Cross Transfusion Center. Covid-19 Coverage View more stories Vaccine trials have made clear that the immune system can mount a robust response to SARS-CoV-2. Beyond that, though, there are a lot of question marks. People exposed…
Another COVID-19 reinfection: This time second infection was more severe

Another COVID-19 reinfection: This time second infection was more severe

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Enlarge / A nurse practitioner administers COVID-19 tests in the parking lot at Brockton High School in Brockton, MA under a tent during the coronavirus pandemic on Aug. 13, 2020. Covid-19 Coverage View more stories A 25-year-old resident of Reno, Nevada was infected with the pandemic coronavirus, SARS-CoV-2, two times, about 48-days apart, with the…
Dissecting the immune system’s response to COVID-19

Dissecting the immune system’s response to COVID-19

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Enlarge / T-cells attacking a cell recognized as foreign. Covid-19 Coverage View more stories We're still struggling to understand whether infection with SARS-CoV-2, with or without COVID-19 symptoms, provides protection from further infections. Antibodies are an indicator of immunity and are the easiest aspect of the immune response to track. But data indicates that the…
Healthy 33-yr-old man first to have confirmed reinfection with SARS-CoV-2

Healthy 33-yr-old man first to have confirmed reinfection with SARS-CoV-2

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Enlarge / Medical staff wearing personal protective equipment (PPE) as a precautionary measure against the COVID-19 coronavirus approach Lei Muk Shue care home in Hong Kong on August 23, 2020. A healthy, 33-year-old man in Hong Kong is now the first person in the world confirmed to have been reinfected by the pandemic coronavirus, SARS-CoV-2—which…
CDC finds lots of undetected coronavirus cases in the US

CDC finds lots of undetected coronavirus cases in the US

Enlarge / A nurse at the Miami Beach Convention Center Community Based Testing Site conducts a COVID-19 antibody test. The Florida Guard is providing support at the Miami Beach hybrid CBTS and Hard Rock Stadium CBTS to allow the state and local partners to conduct antibody testing for first responders at both facilities. (US Army…
Beyond antibodies, the immune response to coronavirus is complicated

Beyond antibodies, the immune response to coronavirus is complicated

Enlarge / T-cells attacking a cell recognized as foreign. Covid-19 Coverage View more stories Ultimately, the only way for societies to return to some semblance of normal in the wake of the current pandemic is to reach a state called herd immunity. This is where a large-enough percentage of the population has acquired immunity to…
Antibody testing suggests immune response post-COVID is very variable

Antibody testing suggests immune response post-COVID is very variable

Enlarge / Melissa Cruz elevates her arm after donating COVID-19 convalescent plasma as phlebotomist Jenee Wilson shuts down a machine. Covid-19 Coverage View more stories How much of an immune response does a SARS-CoV-2 infection produce? It's a critical question for all sorts of reasons. To begin with, long-lasting immunity, either through an infection or…
FDA: Makers of coronavirus antibody tests must now show tests actually work

FDA: Makers of coronavirus antibody tests must now show tests actually...

Enlarge / MAY 4, 2020: A health worker handles a blood sample on the first day of a free COVID-19 antibody testing event. Covid-19 Coverage View more stories After a gush of bogus coronavirus blood tests, the US Food and Drug Administration announced Monday that test makers must submit data within 10 days showing that…
Injecting the flu vaccine into a tumor gets the immune system to attack it

Injecting the flu vaccine into a tumor gets the immune system...

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picture alliance/Getty Images A number of years back, there was a great deal of excitement about using viruses to target cancer. A number of viruses explode the cells that they've infected in order to spread to new ones. Engineering those viruses so that they could only grow in cancer cells would seem to provide a…
Treatments that trigger the body immune system to attack cancer make a Nobel

Treatments that trigger the body immune system to attack cancer make...

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Enlarge / The two systems developed into therapies by today's Nobel winners. For both systems, the APC is an immune cell that presents proteins to the T cell so that it can determine if they're recognized. On the left, if CTLA-4 (yellow) is engaged on the T cell, it tones down the immune response. The…

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