Evolution proceeds by selection of mutants that arise by error-prone duplication of nucleic acid genomes. It is believed that mutations that are selected in a gene are dependent on those that have preceded them, an effect known as epistasis. Analysis of a sequence of changes in the influenza virus nucleoprotein provides clear evidence that stability …
A WORD on the constraints of influenza virus evolution Read More »
Ian Lipkin, Columbia University, New York, and Lyle Petersen, Centers for Disease Control and Prevention, Fort Collins, Colorado, discuss recently emerged pathogens, and how to prepare should their range expand. When asked if MERS-coronavirus would cause the next pandemic, Ian Lipkin responded ‘I don’t have a crystal ball’. Recorded at the Annual Meeting of the American Society …
This article was written for extra credit by a student in my recently concluded virology course. by Nayan Lamba A recent study by scientists at the Ludwig Center for Cancer Immunotherapy offers a new, multifaceted therapy for destroying tumors. A team of researchers led by Dmitriy Zamarin combined checkpoint blockade, a technique aimed at enhancing antitumor …
Later this month (May 2014) the World Health Assembly will decide whether to destroy the remaining stocks of variola virus – the agent of smallpox – or to allow continued research on the virus at WHO-approved laboratories. After the eradication of smallpox in 1980, the World Health Organization called for destruction of known remaining stocks …
Should variola virus, the agent of smallpox, be destroyed? Read More »
This week’s question comes from a graduate student studying virology, who writes: My professor recently said that really, the MOI doesn’t matter in a culture, it is the concentration of viral particles in the media that matters. Ie: if you have 10 million cells or one cell, but you are infecting the plate with 5mL …
The 1918 influenza pandemic was particularly lethal, not only for the very young and the very old (as observed for typical influenza), but unexpectedly also for young adults, 20 to 40 years of age (pictured). It has been suggested that the increased lethality in young adults occurred because they lacked protective immunity that would be conferred …
Unusual mortality pattern of 1918 influenza A virus Read More »
