Table 1.
Characteristics of laboratory-confirmed cases in the Bavarian COVID-19 outbreak in January–February, 2020
| Date of symptom onset | Most likely predecessor (primary case or other patient) | Most likely dates of infection (other possible dates) | Incubation period, days |
Transmission forwards to successor case* |
Self-reported symptoms† | ||||
|---|---|---|---|---|---|---|---|---|---|
| Asymptomatic | Presymptomatic | On date of symptom onset | In the prodromal phase | ||||||
| Patient 1 | Jan 23 | Primary case | Jan 20–21 | 2–3 (assumed 2·5) | No | No | No | No | On day of symptom onset: sore throat Further symptoms: cold-like symptoms, fatigue, chills, fever, cough, headache, joint pain, muscle pain, shortness of breath, and diarrhoea. |
| Patient 2 | Jan 25 | Primary case | Unknown (Jan 20–22) | 3–5 (assumed 4) | Unknown | Unknown | Unknown | Unknown | On day of symptom onset: cold-like symptoms and mild headacheFurther symptoms: mild earache, chills, fatigue, mild sore throat, blocked nose, loose stool, and shortness of breath. |
| Patient 3 | Jan 25 | Patient 1 | Jan 24 | 1 | No | No | Patient 12 | Patient 12 | On day of symptom onset: fatigue, blocked nose, sinus congestion, headache and swollen lymph nodesFurther symptoms: chest pain, cough, and loose stool |
| Patient 4 | Jan 24 | Primary case | Jan 20 (Jan 21–22) | 2–4 (assumed 4) | No | Patient 5 | No | No | On day of symptom onset: chillsFurther symptoms: fatigue, blocked nose, and sinus congestion |
| Patient 5 | Jan 24 | Patient 4 | Jan 22 | 2 | No | Patient 8 (possible) | Patient 6 (possible); patient 7; patient 8 (possible); patient 11 (possible) | No | On day of symptom onset: fever, limb pain, nausea, vomiting, cough, and feverFurther symptoms: fatigue, loss of appetite, and chest pain |
| Patient 6 | Jan 29 | Patient 5 | Unknown | Unknown | NA | NA | NA | NA | Fever, vomiting, and nausea |
| Patient 7 | Jan 28 | Patient 5 | Jan 24 | 4 | No | Patient 14 (possible) | Patient 10; patient 14 (possible); patient 16 (option 1) | No | On day of symptom onset: cough and blocked noseFurther symptoms: fatigue, headache, fever, nosebleed, and pneumonia |
| Patient 8 | Jan 28 | Patient 5 | Jan 24 (Jan 22–23) | 4 | No | No | Patient 16 (option 2) | Patient 16 (option 2) | On day of symptom onset: neck painFurther symptoms: headache and fatigue |
| Patient 9 | Jan 31 | Patient 11 | Unknown | Unknown | NA | NA | NA | NA | Fever, cough, vomiting, and diarrhoea |
| Patient 10 | Jan 30 | Patient 7 | Jan 28 | 2 | NA | NA | NA | NA | On day of symptom onset: shortness of breathFurther symptoms: cold-like-symptoms, night sweat, cough, and pneumonia |
| Patient 11 | Jan 27 | Patient 5 | Unknown | Unknown | No | Patient 9 (possible) | Patient 9 (possible) | No | Fever, limb pain, nausea, vomiting, back pain, and fatigue |
| Patient 12 (diagnosed in Spain) | Jan 30 | Patient 3 | Jan 25 | 5 | NA | NA | NA | NA | Blocked nose |
| Patient 13 (diagnosed in China) | Jan 27 | Primary case | Jan 20–23 | 4–7 (assumed 5·5) | NA | NA | NA | NA | Cough, general symptoms |
| Patient 14 | Feb 3 | Patient 7 | Jan 28–31 | 3–6 (assumed 4·5) | NA | NA | NA | NA | On day of symptom onset: feverFurther symptoms: mild cough, fatigue, mild headache, and loose stool |
| Patient 15 | NA | Patient 2 | Jan 23–28 | Unknown | NA | NA | NA | NA | Asymptomatic |
| Patient 16 | Feb 4 | Patient 7 or Patient 8 | Jan 28 | 7 | NA | NA | NA | NA | Blocked nose |
NA=not applicable.
Asymptomatic indicates transmission through a patient who never developed any symptoms during infection; pre-symptomatic indicates transmission through a patient who developed symptoms only after the transmission to another person; at day of symptom onset indicates transmission through a patient on the date of symptom onset, including both specific (fever and cough) and non-specific symptoms; in the prodromal phase indicates transmission through a patient during the phase where only non-specific symptoms (ie, other than fever or cough) were present.
Symptoms are divided into those on the day of symptom onset and further symptoms that developed after the day of symptom onset. Where no division is specified, all symptoms were present from day of symptom onset.