Q and A: about health and research

When people think about dangerous viruses, they often focus on the immediate illness. However, some viruses continue affecting the body long after the initial infection has passed.  Ebola is one well-known example, with survivors often experiencing ongoing fatigue, joint pain, eye problems, and neurological complications.  But Ebola is far from the only virus linked to lasting health issues. Medical researchers now recognize that many viral infections can trigger long-term complications, sometimes lasting months, years, or even a lifetime. These lingering conditions are often referred to as post-viral syndromes . COVID-19 and Long COVID One of the most widely discussed examples today is SARS-CoV-2 , the virus that causes COVID-19. Millions of people worldwide have reported persistent symptoms after recovering from the acute infection, a condition commonly called Long COVID . Long COVID can affect multiple organs and systems, including: Chronic fatigue Brain fog and memo...

When neuroscientist and biologist Robert Sapolsky was asked whether the COVID-19 pandemic could increase the risk of schizophrenia and other long-term developmental disorders in future generations, his answer drew on one of the most unsettling lessons in medical history: what happens in the womb may echo across an entire lifetime. The question came from Sonali in India, who asked whether societies are prepared for the long-term consequences of prenatal exposure to SARS-CoV-2. The concern is not merely whether pregnant women became ill during the pandemic, but whether the biological and psychological conditions surrounding pregnancy during COVID may shape health outcomes decades into the future. To understand why researchers are taking this possibility seriously, it helps to examine what science has already learned from past pandemics, famines, and prenatal crises. The Fetal Origins of Adult Disease Modern medicine increasingly recognizes a principle known as the “fetal origins of...

A short explanation: Researchers found that areas in the brain where microglia lose the receptor P2Y12R often coincide with places where blood vessels are inflamed or damaged. This suggests that microglial changes are closely linked to vascular inflammation in the brain . When blood vessels become inflamed, less oxygen and nutrients reach neurons , and inflammatory molecules can leak into the surrounding brain tissue . In response, microglia become activated and alter their normal behavior , which can disrupt the signaling between neurons. These changes interfere with how neurons communicate with each other, leading to cognitive symptoms. As a result, people may experience slow thinking, poor concentration, memory issues, and mental fatigue . Therefore, brain fog is often thought to arise from disrupted brain signaling caused by inflammation and reduced blood flow in the brain’s blood vessels .  Read publication: Microglia dysfunction, neurovascular inflammation and focal neuropa...

According to recent research, Receptor-mediated mechanisms underlying neurological complications in COVID-19: from viral entry to neuroinflammation  https://link.springer.com/article/10.1007/s13205-026-04749-4 Neurological problems caused by COVID-19 can occur during the infection or continue afterward as long-term symptoms. Scientists still do not fully understand exactly how these problems develop. However, research from clinical studies, brain imaging, tissue analysis, and molecular biology suggests that the virus usually does not directly infect large parts of the brain. Instead, most neurological damage appears to happen through immune reactions and blood-vessel problems triggered by the virus. The virus mainly enters cells through a receptor called ACE2. Another molecule, neuropilin-1 (NRP1), may help the virus reach areas such as the olfactory system and nearby blood vessels. Other receptors, including CD147 and DPP4, probably do not act as main entry points for the vi...