In adults, bodywide morbilliform rashes are typically drug eruptions.
However, viral exanthema should always be included in the differentials.
Childhood infections such as Measles and Rubella should be considered in immunocompromised patients and those with no history of vaccination.
Always remember to do a sexual history and consider HIV as a diagnosis.
COVID-19 can manifest in a variety of ways including several distinct types of rash.
Viral PCR and serology can be used to differentiate the underlying cause.