A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism. Viruses infect all types of life forms, from animals and plants to microorganisms, including bacteria and archaea.
Category Archives: Health
Covid-19: ‘Why Variants Are Spreading Faster’
As highly transmissible coronavirus variants sweep across the world, scientists are racing to understand why these new versions of the virus are spreading faster, and what this could mean for vaccine efforts. New research says the key may be the spike protein, which gives the coronavirus its unmistakable shape. Illustration: Nick Collingwood/WSJ
Humor: Top Covid-19 Cartoons – Week Of Feb 19



Medicine: Scientists Grow ‘Mini-Organs’ To Repair Damaged Human Livers
Scientists have used a technique to grow bile duct organoids – often referred to as ‘mini-organs’ – in the lab and shown that these can be used to repair damaged human livers. This is the first time that the technique has been used on human organs. Funding provided by European Research Council, the National Institute for Health Research and the Academy of Medical Sciences
Infographic: ‘U.S. Health Care Hospitals & Systems’

Medical Research: ‘Next Generation Vaccines’
Vaccine science and technology is advancing. Next generation vaccines could change how we combat infectious diseases, and it’s important to understand how the technology works.
Video: ‘How Covid-19 Vaccines Are Tested’
Vaccines are rigorously studied and tested — but there are challenges along the way.
Covid-19 Infographic: The Top Vaccines Most Widely Used Around The World

Eight different Covid-19 vaccines are currently being used around the world and just over 172 million people have received their first dose, 2.2 for every 100 people. All of the vaccines being used require two shots but that is set to change with Johnson & Johnson’s JNJ+0.3%JNJ+0.3% one-shot vaccine expected to gain regulatory approval for use in the United States within weeks. As it stands, the first Covid-19 vaccine to be authorized for use in the U.S. is also the most widely used shot globally, according to information from website Our World in Data reported by The New York Times.
PODCAST: ‘THE FUTURE OF DRUG PRICE TRANSPARENCY’
Interview with Dr. William Feldman on a new federal price-transparency rule and legal challenges to efforts to increase access to pricing information.
William Feldman is a physician and researcher in the Division of Pharmacoepidemiology and Pharmacoeconomics at Brigham and Women’s Hospital. Stephen Morrissey, the interviewer, is the Executive Managing Editor of the Journal.
Covid-19: Penn Medicine Explains mRNA Vaccines
Vaccines are about to change the world…again. mRNA Vaccines are currently being used to battle COVID-19, and have the potential to eradicate diseases like HIV, herpes, sickle cell anemia, and even cancer. Learn how the vaccines work and where the technology could be headed in this explainer video.
Currently, the Pfizer-BioNTech and Moderna vaccines for COVID-19 use the mRNA technology developed at Penn by infectious disease expert Drew Weissman, MD, PhD, along with longtime research collaborator Katalin Karikó, PhD, an adjunct associate professor. Dr. Weissman has been studying mRNA vaccines for decades. This technology could change the way future vaccines are made to prevent countless other diseases.