Germs and Viruses like Norovirus and Coronavirus

In this age of pandemic scares I began to wonder how effective our appliances are dealing with bacteria, yeasts, and viruses. It turns out that the act of washing clothing in your washing machine, even with hot water, is not nearly as effective as believed. It is actually the dryer that eliminates or kills microbes. Here is a very informative link to and article on

Preventing the spread of infection is possible if you keep in mind that clean does not necessarily mean it is free of contamination. Here is a great article that gives a rundown on how to prevent the spread of contamination.

How about dishwashers? Researching the question a little yielded many interesting results.

According to the EPA, by sanitizing you can "reduce to a safe level, but not totally eliminate, microorganisms on a treated surface."

The National Sanitation Foundation's standard NSF/ANSI Standard 184, specifies that dishwashers bearing this certification kill 99.99 percent of bacteria when the setting is on sanitize. All other dishwashers without this certification do not. The working water temperature of the machine must be able to reach and maintain 150F in order to be certified for NSF/ANSI Standard 184.

About bacteria there is a great article here at It turns out that while most dishwasher kill a large number of bacteria and viruses, not all are set up to sanitize dishes completely. To effectively sanitize dishes of the more resistant viruses, etc. a disinfectant must be used, and the water temperature must be at least 171F (77Celsius). Some viruses are more difficult to eliminate than others. Norovirus is among the most difficult. Not enough research has been done to determine the exact disinfection protocols for eliminating Coronavirus from surfaces, so for now standard cleaning and disinfecting protocols should suffice. Here is what the CDC recommends.

The CDC also says that, "flu viruses are relatively fragile, so standard cleaning and disinfecting practices are sufficient to remove or kill them."


In these times of COVID-19, some experts have put together a guide that explains what kinds of precautions to take when handling traditional currency and how to best utilize digital methods of payment. They also provide advice on what preventive measures consumers can take financially during these uncertain times. Here is the link:

9 thoughts on “Germs and Viruses like Norovirus and Coronavirus”

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