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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Ximena Vergara
Ximena Vergara
Epidemiology
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Dana Hunnes
Dana Hunnes
Community Health Sciences
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Kimberly Gregory
Kimberly Gregory
Community Health Sciences
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Paul Dluzniewski
Epidemiology
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Tony Kuo
Tony Kuo
Epidemiology
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Haroutune Armenian
Haroutune Armenian
Epidemiology
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glik, deborah
Deborah Glik
Community Health Sciences
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Dr. Marjan Javanbakht
Marjan Javanbakht
Epidemiology
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Jian Li
Jian Li
Environmental Health Sciences Epidemiology
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Jørn Olsen
Epidemiology
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Jian Yu Rao
Epidemiology
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David Eisenman
David Eisenman
Community Health Sciences
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Leeka I. Kheifets
Epidemiology
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Dr. Samuel Stratton
Samuel Stratton
Community Health Sciences
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halbert, ronald
Ronald Halbert
Community Health Sciences
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Dr. Roger Detels
Roger Detels
Epidemiology
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Anne Coleman
Anne Coleman
Epidemiology
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Roberta Malmgren
Epidemiology
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Dr. Hiram Beltrán-Sánchez
Hiram Beltrán-Sánchez
Community Health Sciences
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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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Karin Michels
Karin B. Michels
Epidemiology
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Dr. Jessica Gipson
Jessica Gipson
Community Health Sciences
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Akihiro Nishi Headshot
Akihiro Nishi
Epidemiology
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Dr. May Sudhinaraset
May Sudhinaraset
Community Health Sciences
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Wendelin Slusser
Community Health Sciences
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Matthew Mimiaga
Matthew J. Mimiaga
Epidemiology
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Sander Greenland
Sander Greenland
Epidemiology
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Naomi Greene
Naomi Greene
Epidemiology
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Dr. Dana Rose Garfin
Dana Rose Garfin
Community Health Sciences
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Dr. Michael Rodriguez
Michael Rodriguez
Community Health Sciences
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Charlotte Neumann
Charlotte G. Neumann
Community Health Sciences
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Vonthanak Saphonn
Epidemiology
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Teresa Ellen Seeman
Epidemiology
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Jody Heymann
Jody Heymann
Epidemiology Health Policy and Management
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Dr. Elizabeth D'Amico
Elizabeth D’Amico
Community Health Sciences
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Hashibe, Mia
Mia Hashibe
Epidemiology
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Courtney Thomas Tobin headshot.png
Courtney S. Thomas Tobin
Community Health Sciences
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Sheba George
Community Health Sciences
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Dr. Anne Pebley
Anne Pebley
Community Health Sciences
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Dr. Liwei Chen
Liwei Chen

Professor in Epidemiology

Epidemiology
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Annette Regan
Epidemiology
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Marjorie Kagawa-Singer
Marjorie Kagawa-Singer
Community Health Sciences
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Dr. Randall Kuhn
Randall Kuhn
Community Health Sciences
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Ilan H. Meyer
Ilan H. Meyer
Community Health Sciences
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Niklas Krause
Environmental Health Sciences 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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Noel Weiss
Epidemiology
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Susan Cochran
Susan Cochran
Epidemiology
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Virginia C. Li
Virginia C. Li
Community Health Sciences
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Dr. Chandra Ford
Chandra Ford
Community Health Sciences
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Angie Otiniano Verissimo
Community Health Sciences
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Woman dressed in blue and wearing pearls and eye glasses
Lisa V. Smith
Epidemiology
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Nina Harawa
Epidemiology
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Dena Herman
Dena Herman
Community Health Sciences
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Amy Wohl
Epidemiology
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Nathan Wong
Nathan D. Wong
Epidemiology
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Nicole Hoff
Epidemiology
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Elizabeth Rose Mayeda photo
Elizabeth Rose Mayeda
Epidemiology
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May Wang headshot
May C. Wang
Community Health Sciences
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Kamyar Kalantar-Zadeh
Kamyar Kalantar-Zadeh
Epidemiology
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Kelika Konda
Epidemiology
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DerSarkissian, Maral
Maral DerSarkissian
Epidemiology
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Paula Tavrow
Paula Tavrow
Community Health Sciences
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Roch Nianogo
Roch A. Nianogo
Epidemiology
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Dr. Elizabeth Yzquierdo
Elizabeth Yzquierdo
Community Health Sciences
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Lawrence Ash
Epidemiology
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Peter R. Kerndt
Epidemiology
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Bailley, Julia
Julia Bailey
Epidemiology
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Dallas Swendeman
Epidemiology
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Jonathan Jacobs
Jonathan Jacobs
Epidemiology
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sheena sullivan photo
Sheena G. Sullivan
Epidemiology
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Dr. Brian Bradbury
Brian Bradbury
Epidemiology
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Dr. Shira Shafir
Shira Shafir
Community Health Sciences Epidemiology
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Dr. Alina Dorian
Alina Dorian
Community Health Sciences
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Dr. Zuo-Feng Zhang
Zuo-Feng Zhang
Epidemiology
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Alexandra Binder Headshot
Alexandra Binder
Epidemiology
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Sarah Blenner
Sarah Blenner

Director of Field Studies and Applied Professional Training

Community Health Sciences
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Dr. Gilbert Gee
Gilbert C. Gee
Community Health Sciences
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Kimberley Shoaf
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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Dr. Beate Ritz
Beate Ritz
Environmental Health Sciences Epidemiology
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Philip Massey headshot
Philip Massey
Community Health Sciences
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Dr. Timothy Brewer
Timothy Brewer
Epidemiology
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Pamina Gorbach
Pamina Gorbach
Epidemiology
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Frank J. Sorvillo
Epidemiology
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Christie Jeon
Epidemiology
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Bo-Kyung Elizabeth Kim
Community Health Sciences
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Dawn Upchurch
Community Health Sciences
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Paul Simon Headshot
Paul Simon
Epidemiology
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Natalie Muth
Community Health Sciences
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Jennifer A. Wagman
Jennifer A. Wagman
Community Health Sciences
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Dr. Anne Rimoin
Anne Rimoin
Epidemiology
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Aziz, Najib headshot_2023
Najib Aziz
Epidemiology
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Marissa J. Seamans
Marissa Seamans
Epidemiology
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Dr. Judith M. Siegel
Judith M. Siegel
Community Health Sciences
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Peter Katona
Epidemiology
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Sung-Jae Lee
Sung-Jae Lee
Epidemiology
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Otoniel Martinez-Maza
Otoniel Martinez-Maza
Epidemiology
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Onyebuchi Arah headshot
Onyebuchi A. Arah
Epidemiology
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Dr. Michael Goldstein
Michael Goldstein
Community Health Sciences
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Su Yong Jung
Su Yon Jung
Epidemiology
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Julia Heck
Julia Heck
Epidemiology
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Ralph R. Frerichs, 12/25/21
Ralph R. Frerichs
Epidemiology
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N/A
Epidemiology
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Dr. Donald Morisky
Donald E. Morisky
Community Health Sciences
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Dr. Michael Prelip
Michael Prelip
Community Health Sciences
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Ondine S. von Ehrenstein
Community Health Sciences Epidemiology
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Dr. Paul Hsu
Paul Hsu
Epidemiology
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