Dutch report that patients who already were infected with bacteria, die at much higher rates when a second virus infection with COVID-19 occurs:

https://medicalxpress.com/news/2020-04-covid-deaths.html

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Acute Respiratory Distress Syndrome in patients with COVID-19 can lead to death but more than 50% of these cases are associated with co-infection with bacterial pathogens.
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Patients with pre-existing respiratory disease, which often includes an elevated presence of bacteria in the nose, throat and lungs, are among those with the highest COVID-19 death rates," says Dr. Eijkelkamp, a lecturer in microbiology.

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