Table 1.

Types of long COVID-19 syndrome [6].

Type of long COVID-19 syndrome	Features
Type 1	Symptoms with varying lengths of recovery and rehabilitation that directly correlate with the severity of infection, target organ damage and pre-existing medical conditions at the time of initial infection
Type 2	Symptoms persisting for 6 weeks from the time of initial infection
Type 3	Period of quiescence or near-complete recovery following initial infection, followed by a return of symptoms that persist for ≥3 months (Type 3A) or ≥ 6 months (Type 3B)
Type 4	Initially asymptomatic at the time of a positive SARS-CoV-2 test but develop symptoms beginning 1–3 months (Type 4A) or ≥ 3 months (Type 4B) later that persist for varying lengths of time
Type 5	Initially asymptomatic or minimally symptomatic at the time of a positive SARS-CoV-2 test and experience sudden death within the next 12 months.