William Petri

William A. Petri, Jr., M.D., Ph.D. studies immunology and molecular pathogenesis of enteric infections and their consequences. The scope of research includes molecular parasitology of Entamoeba, innate immune host defense against Clostridium difficile, and in Bangladesh acquired immunity to Cryptosporidium. We study infections in mouse models, in humans (including clinical trials) and at the lab bench. Petri leads the PROVIDE study of the Bill & Melinda Gates Foundation that is exploring in Bangladesh and India the pathogenesis of enteric environmental dysfunction (EED) and its association with oral poliovirus and rotavirus vaccine failures, malnutrition and neurocognitive developmental delay. Petri has received from Governor Terry McAuliffe both the Commonwealth of Virginia Outstanding Faculty Award (2014) and the Outstanding Scientist Award (2017). He has been recognized at UVa with the Kadner Award for Graduate Teaching, the All-University Teaching, and Inventor of the Year Awards. Petri has served as President of the American Society of Tropical Medicine and Hygiene and Editor of Infection and Immunity, and is currently Associate Editor for PLoS Pathogens, Clinical Infections Diseases and Trends in Molecular Medicine. He has received the Oswald Avery Award of the Infectious Diseases Society of America, the Burroughs Wellcome New Investigator and Scholar Awards in Molecular Parasitology, and the Lucille P. Markey Scholar Award in Biomedical Research. He has served continuously since 1993 on advisory committees for the NIH. Bill Petri received the MD and PhD (Microbiology) degrees from UVA, did medicine residency at Case Western and returned to UVA for infectious diseases fellowship. He spends 3 months of every year caring for patients on the general medicine and infectious diseases services and the remainder is focused on research on infectious diseases, especially the molecular pathogenesis of diarrheal infections in children living in poverty in Bangladesh and the immunology of C. difficile infection in a mouse model and in patients at UVA hospital.

Mind and Body
Johnson & Johnson vaccine: Why it’s worth the minuscule risk
William Petri
The benefits outweigh the risks.
the shot
How effective is the first shot of the Pfizer or Moderna vaccine?
William Petri and The Conversation
A single dose is effective at getting the body on the path to immunity
Final phase
How and when will we know a coronavirus vaccine is safe and effective?
William Petri
All signs point to a healthier 2021.
Positive news
Covid-19 vaccine: 9 reasons to be optimistic for availability in 2021
William Petri
Experts are confident there will be a vaccine next year.
Science
How long does Covid-19 stay in the body?
William Petri
Are there places in the body where SARS-CoV-2 can hide from the immune system?
Science
7 drugs and therapies that could work for Covid-19
William Petri
We are slowly figuring it out.
The latest
Here's what we know about Covid-19 recovery
William Petri
With over 2 million cases in the U.S. since the coronavirus pandemic began in late December, there are now many people who have recovered from COVID-19.
Science
Are you immune to Covid-19 if you have the antibodies? 5 big answers
William Petri
For those who have suffered from COVID-19, do their antibodies guarantee immunity from subsequent disease?
Science
6 questions about Covid-19 that are stumping physicians
William Petri
How can so many people experience such mild symptoms and others quickly die from it?
Science
Do you have Covid-19 but aren't showing symptoms? A physician answers 5 questions
William Petri
In general, having an infection without any symptoms is common. Perhaps the most infamous example was Typhoid Mary, who spread typhoid fever to other people without having any symptoms herself in the early 1900s.
Mind and Body
What are coronavirus symptoms? A doctor answers 4 essential questions
William Petri
When do you need to call your doctor?
Science
Are you in danger of catching the coronavirus? 5 things you need to know
William Petri
Will this spread?