COVID-19: Why did the UK implement strong measures after finding only two patients with the South African variant?

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By Daniel R. Lucey M.D., MPH, FIDSA

On Wednesday  (yesterday), United Kingdom Health Minister Matt Hancock announced that two persons in the UK had been diagnosed with the South African variant virus and as a result immediate actions were taken, including strict “quarantine” of anyone who has been in South Africa or even been a “close contact” of someone who has been in South Africa within a fortnight (14 days), as well as restricting travel with South Africa. What possible reasons could justify such strong measures?

First, it is important that these two cases were contacts of a traveler from the Republic of South Africa (RSA), as reported Wednesday by Public Health England.

These initially-recognized two cases being contacts of a traveler means that transmission in the UK has already occurred, and many more will occur unless stopped rapidly. Moreover, earlier examples of transmission within the UK (and other nations e.g., the United States) by this RSA variant likely occurred, but were not recognized.

Second, were either of these two contact patients, or the traveler from South Africa under the age of 30? (Anecdotal reports from RSA state that this variant virus is more likely to infect young people.)

Third, had either of these two contacts, or the infected traveler, been infected previously with SARS-CoV-2 and thus re-infected with a variant virus?

The UK health minister also stated yesterday that the virus from these two patients will be analyzed at Porton Down (the Public Health England Laboratories). Most likely, this means that the four issues of concern listed below will be assessed in the UK and (likely already in RSA):

  • Any increased growth rate or infectivity in cell cultures?
  • Any resistance to antibodies (monoclonals or convalescent serum)?
  • Any resistance to vaccines?
  • Any recombination between UK and RSA variants to produce a third variant (“offspring” or “progeny” virus)? Such novel variants could have different mutation patterns, especially in the receptor binding domain (RBD) that is crucial to infecting human cells and to the efficacy of antibody treatment and vaccines.

Answers to these questions and concerns will be a key contribution to the world by UK and RSA.

Dr. Daniel Lucey

Daniel Lucey, M.D. MPH, FIDSA, FACP, is a Clinical Professor of Medicine (Teaching) at Dartmouth Geisel School of Medicine, adjunct Professor at Georgetown Medical Center, senior scholar at Georgetown Law, Anthropology Research Associate at the Smithsonian Museum of Natural History and a member of the Infectious Diseases Society of America Global Health Committee. He served as a volunteer to outbreaks overseas including patient care in Sierra Leone and Liberia (MSF) during Ebola 2014, SARS 2003, MERS 2013, Plague 2017 as well as H5N1, Zika, and Yellow Fever. Since Jan. 6 he has contributed more than 50 posts to Science Speaks on COVID-19 and traveled to China Feb. 11. With career experiences, he proposed and helped design the 2018-2022 Smithsonian Exhibition on Epidemics.


One thought on “COVID-19: Why did the UK implement strong measures after finding only two patients with the South African variant?

  1. Pingback: COVID-19: Why a “U.S. variant” will likely be identified in early 2021 | Science Speaks: Global ID News

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