2022

"New coronavirus variants emerge: BA.4, BA.5 likely reinfecting Omicron survivors"


The Los Angeles Times interviewed Dr. Robert Kim-Farley about the possibility that survivors of earlier Omicron strains can get reinfected.

Individual putting on mask

A pair of new Omicron subvariants has emerged, raising the possibility that survivors of earlier Omicron strains can get reinfected.

BA.4 and BA.5 have gained increasing attention in South Africa as weekly coronavirus cases tripled in the last two weeks, according to data from Johns Hopkins University.

“It really came out of the blue over the weekend. We were already settling down with BA.2.12.1, and then BA.4 and BA.5?” said Dr. Peter Chin-Hong, an infectious diseases expert at UC San Francisco. “It just seems like the latest chapter of a never-ending saga.”

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Faculty Referenced by this Article

Robert Kim-Farley
Robert J. Kim-Farley

Robert J. Kim-Farley, MD, MPH, is a Professor-in-Residence with joint appointments in the Departments of Epidemiology and Community Health Sciences

Community Health Sciences Epidemiology
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Dr. Michael Prelip
Michael Prelip
Community Health Sciences
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Dr. Hiram Beltrán-Sánchez
Hiram Beltrán-Sánchez
Community Health Sciences
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Nicole Hoff
Epidemiology
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Pamina Gorbach
Pamina Gorbach
Epidemiology
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Dr. Michael Goldstein
Michael Goldstein
Community Health Sciences
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Haroutune Armenian
Haroutune Armenian
Epidemiology
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Dr. Alina Dorian
Alina Dorian
Community Health Sciences
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Valentine M. Villa
Community Health Sciences
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Dr. Paul Hsu
Paul Hsu
Epidemiology
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Teresa Ellen Seeman
Epidemiology
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Dr. Judith M. Siegel
Judith M. Siegel
Community Health Sciences
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Julia Heck
Julia Heck
Epidemiology
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James Macinko
James Macinko

Professor of Community Health Sciences & Health Policy and Management, and Associate Dean for Research

Community Health Sciences Health Policy and Management
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Kelika Konda
Epidemiology
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Dr. Jessica Gipson
Jessica Gipson
Community Health Sciences
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May Wang headshot
May C. Wang
Community Health Sciences
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Sung-Jae Lee
Sung-Jae Lee
Epidemiology
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Dr. Beate Ritz
Beate Ritz
Environmental Health Sciences Epidemiology
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Kimberly Gregory
Kimberly Gregory
Community Health Sciences
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Naomi Greene
Naomi Greene
Epidemiology
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Dr. Anne Rimoin
Anne Rimoin
Epidemiology
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Onyebuchi Arah headshot
Onyebuchi A. Arah
Epidemiology
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Paul Simon Headshot
Paul Simon
Epidemiology
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Dr. Shira Shafir
Shira Shafir
Community Health Sciences Epidemiology
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Dr. Randall Kuhn
Randall Kuhn
Community Health Sciences
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Ralph R. Frerichs, 12/25/21
Ralph R. Frerichs
Epidemiology
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Amy Wohl
Epidemiology
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Emily Beeler
Epidemiology
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Ximena Vergara
Ximena Vergara
Epidemiology
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Sander Greenland
Sander Greenland
Epidemiology
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Marissa J. Seamans
Marissa Seamans
Epidemiology
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Elizabeth Rose Mayeda
Epidemiology
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Virginia C. Li
Virginia C. Li
Community Health Sciences
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Catherine Carpenter
Epidemiology
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Dr. Dvora Joseph Davey
Dvora Joseph Davey

Dr. Joseph Davey is an infectious disease epidemiologist with over 20 years' experience leading research on HIV/STI services for women and children.

Epidemiology
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Sarah Blenner
Sarah Blenner

Director of Field Studies and Applied Professional Training

Community Health Sciences
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Dawn Upchurch
Community Health Sciences
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Otoniel Martinez-Maza
Otoniel Martinez-Maza
Epidemiology
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Noel Weiss
Epidemiology
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Anne Coleman
Anne Coleman
Epidemiology
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Dr. Anne Pebley
Anne Pebley
Community Health Sciences
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Su Yong Jung
Su Yon Jung
Epidemiology
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Nina Harawa
Epidemiology
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Philip Massey headshot
Philip Massey
Community Health Sciences
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Annette Regan
Epidemiology
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Leeka I. Kheifets
Epidemiology
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Natalie Muth
Community Health Sciences
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Cathy Lang
Cathy Lang

Assistant Dean for Research & Adjunct Associate Professor of Community Health Sciences

Community Health Sciences
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Vonthanak Saphonn
Epidemiology
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Dr. Dana Rose Garfin
Dana Rose Garfin
Community Health Sciences
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Matthew Mimiaga
Matthew J. Mimiaga
Epidemiology
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Dr. Zuo-Feng Zhang
Zuo-Feng Zhang
Epidemiology
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Jonathan Jacobs
Jonathan Jacobs
Epidemiology
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Dr. Chandra Ford
Chandra Ford
Community Health Sciences
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Tony Kuo
Tony Kuo
Epidemiology
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Ondine S. von Ehrenstein
Community Health Sciences Epidemiology
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Paul Dluzniewski
Epidemiology
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Jian Li
Jian Li
Environmental Health Sciences Epidemiology
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Dena Herman
Dena Herman
Community Health Sciences
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Dr. May Sudhinaraset
May Sudhinaraset
Community Health Sciences
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Kamyar Kalantar-Zadeh
Kamyar Kalantar-Zadeh
Epidemiology
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Dr. Donald Morisky
Donald E. Morisky
Community Health Sciences
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Susan Cochran
Susan Cochran
Epidemiology
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Lawrence Ash
Epidemiology
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Akihiro Nishi Headshot
Akihiro Nishi
Epidemiology
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Kimberley Shoaf
Community Health Sciences
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Aziz, Najib headshot_2023
Najib Aziz
Epidemiology
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Lisa V. Smith
Epidemiology
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Dr. Marjan Javanbakht
Marjan Javanbakht
Epidemiology
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Karin Michels
Karin B. Michels
Epidemiology
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Dr. Roger Detels
Roger Detels
Epidemiology
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Nathan Wong
Nathan D. Wong
Epidemiology
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Marjorie Kagawa-Singer
Marjorie Kagawa-Singer
Community Health Sciences
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Sheba George
Community Health Sciences
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Paula Tavrow
Paula Tavrow
Community Health Sciences
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Dr. Elizabeth D'Amico
Elizabeth D’Amico
Community Health Sciences
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Dana Hunnes
Dana Hunnes
Community Health Sciences
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Peter Katona
Epidemiology
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Sean Darling-Hammond
Sean Darling-Hammond
Biostatistics Community Health Sciences
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Charlotte Neumann
Charlotte G. Neumann
Community Health Sciences
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Dr. Liwei Chen
Liwei Chen

Professor in Epidemiology

Epidemiology
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glik, deborah
Deborah Glik
Community Health Sciences
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David Eisenman
David Eisenman
Community Health Sciences
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Frank J. Sorvillo
Epidemiology
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Bo-Kyung Elizabeth Kim
Community Health Sciences
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Wendelin Slusser
Community Health Sciences
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Jørn Olsen
Epidemiology
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Dr. Samuel Stratton
Samuel Stratton
Community Health Sciences
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Diana Bonta
Diana Bonta
Community Health Sciences
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Niklas Krause
Environmental Health Sciences Epidemiology
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Bailley, Julia
Julia Bailey
Epidemiology
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Jennifer A. Wagman
Jennifer A. Wagman
Community Health Sciences
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Ilan H. Meyer
Ilan H. Meyer
Community Health Sciences
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Dallas Swendeman
Epidemiology
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Courtney Thomas Tobin headshot.png
Courtney S. Thomas Tobin
Community Health Sciences
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Christie Jeon
Epidemiology
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Jody Heymann
Jody Heymann
Epidemiology Health Policy and Management
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Dr. Michael Rodriguez
Michael Rodriguez
Community Health Sciences
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Dr. Elizabeth Yzquierdo
Elizabeth Yzquierdo
Community Health Sciences
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Dr. Brian Bradbury
Brian Bradbury
Epidemiology
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DerSarkissian, Maral
Maral DerSarkissian
Epidemiology
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Roberta Malmgren
Epidemiology
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Dr. Timothy Brewer
Timothy Brewer
Epidemiology
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Peter R. Kerndt
Epidemiology
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Jian Yu Rao
Epidemiology
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Roch Nianogo
Roch A. Nianogo
Epidemiology
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Hashibe, Mia
Mia Hashibe
Epidemiology
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Alexandra Binder Headshot
Alexandra Binder
Epidemiology
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Dr. Gilbert Gee
Gilbert C. Gee
Community Health Sciences
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sheena sullivan photo
Sheena G. Sullivan
Epidemiology
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halbert, ronald
Ronald Halbert
Community Health Sciences
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