Cadmium linked to extra extreme flu and pneumonia infections

On this interview, Information-Medical speaks to Dr. Howard Hu about his newest analysis into cadmium and the way it may very well be inflicting extra extreme pneumonia infections, and will probably be growing the severity of COVID-19.

What provoked your analysis into the severity of viral infections such because the flu and pneumonia?  

Dr. Park and I’ve been conducting research on cadmium toxicity for a few years and knew that it’s damaging to the lungs by means of a mechanism that will contain compromising the lung’s immune system.

The analysis we undertook was subsequently designed to make use of the information out there from a really giant common inhabitants examine, the U.S. Nationwide Well being and Vitamin Examination Survey (NHANES), to see whether or not cadmium publicity will increase the chance of demise from viral infections and pneumonia.


Pneumonia. Picture Credit score: Magic mine/

What’s cadmium and the place is that this chemical generally discovered?

Cadmium is a poisonous metallic pollutant that folks have been uncovered to attributable to its dispersion into air, soil, water, and sewage from mining, smelting, and the manufacturing (and related emissions) of nickel-cadmium batteries, pigments, plastics, and different merchandise.

Such dispersion has led to the uptake of cadmium in lots of plant species that people eat (in addition to tobacco, a serious supply of cadmium publicity), in addition to in animal meats, notably organs such because the liver and kidneys.

Are you able to describe the way you carried out your analysis into cadmium and its impact on viral infections?

We used knowledge from the NHANES examine’s grownup contributors on cadmium ranges in urine, which signify accrued physique burdens of cadmium, and examined their relationship to every participant’s subsequent danger of dying from influenza virus or pneumonia.

What did you uncover?

We discovered that compared to contributors whose cadmium ranges have been low (within the lowest 20%), contributors whose cadmium ranges have been excessive (within the high 20%) had a 15% increased danger of dying from influenza or pneumonia.

The danger was even increased amongst never-smokers (27%).

Cadmium Test

Cadmium Check. Picture Credit score: bangoland/

Why is it troublesome for the human physique to excrete cadmium in comparison with different poisonous metals?

In contrast to the principle route of excretion for many different poisonous metals, cadmium will not be successfully excreted by the kidneys.

Do you consider that cadmium may very well be liable for the severity of COVID-19 infections in some people?

That may be a suspicion that’s raised by our examine.

As extra knowledge is now out there on COVID-19, do you propose on additional assessing the hyperlink between cadmium and COVID-19 severity?

Sure, we purpose to immediately examine the potential position of cadmium burdens in worsening COVID-19 severity by way of extreme lung illness and demise.

How can individuals scale back their publicity to cadmium?

People who smoke ought to give up smoking since cigarettes are a serious supply of cadmium.  Meat eaters ought to think about avoiding organ meats, notably the liver and kidneys.  Sadly, different sources of dietary cadmium embody meals which are consumed by many as a part of a balanced, nutritious weight loss plan, resembling rice, cereal grains, potatoes, and leafy greens.

Relating to greens, a dietary technique may very well be shifting to greens like cabbage and broccoli, which don’t focus cadmium.  Most of all, coverage modifications are wanted to scale back the sources of air pollution that contribute to cadmium in our meals provide.


Smoking. Picture Credit score: Nopphon_1987/

How can your analysis assist to boost consciousness of decreasing cadmium publicity? What can policymakers do to assist unfold consciousness?

Since it could be troublesome for individuals to keep away from cadmium publicity given its presence in lots of widespread meals, it’s crucial to proceed coverage efforts that scale back and remove the discharge of cadmium air pollution into the atmosphere; and to proceed the monitoring of cadmium in meals and in samples of the overall inhabitants (resembling NHANES, which continues to gather knowledge on a common inhabitants pattern of Individuals all through america).

What are the subsequent steps in your analysis?

We purpose to leverage the archived urine samples and knowledge of sufferers hospitalized with COVID-19 to immediately take a look at the speculation that cadmium burdens might worsen pulmonary and mortality outcomes from COVID-19.

The place can readers discover extra info?

The total scientific paper might be discovered at

About Dr. Howard Hu

Dr. Hu, a physician-scientist-epidemiologist, has been a tenured Professor, Director, Division Chair, and Dean in positions at Harvard (1990-2006), the College of Michigan (2006-2012), and the College of Toronto (2012-2018).  He’s at present Professor and the Flora L. Thornton Chair of the Division of Preventive Drugs within the Keck Faculty of Drugs of the College of Southern California.Dr. Howard Hu

Dr. Hu has led worldwide groups investigating the environmental, dietary, social, and epi/genetic determinants of persistent illness and impaired baby improvement in population-based research based mostly within the U.S., Mexico, India, China, and elsewhere around the globe.  His staff’s work has been constantly funded by the U.S. Nationwide Institutes of Well being, generated over 300 publications, and received many awards.

Dr. Hu has served on the Board of Inhabitants and Public Well being Apply of the Institute of Drugs/Nationwide Academy of Sciences; the Board of Environmental Research and Toxicology of the Nationwide Analysis Council; and on the Exterior Advisory Council of the U.S. Nationwide Institute for Environmental Well being Sciences.  He has additionally been a Senior Fulbright Scholar (in India, 1999-2000), a member of the Board of Administrators and investigator on 4 fact-finding missions for Physicians for Human Rights; and the Chair of the Analysis Fee for the Worldwide Physicians for the Prevention of Nuclear Warfare.

Dr. Hu acquired an M.D. from the Albert Einstein Faculty of Drugs; an M.P.H. and Sc.D. (epidemiology) from the Harvard Faculty of Public Well being, and is board-certified in Inner Drugs and Preventive (Occupational) Drugs.

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