Abstract
Objective: To describe the occurrence of COVID-19 with an ultra-short incubation period in a familial cluster. Experience report: Description of a series of eighteen cases of COVID-19 from the same familial cluster, with possible contamination at a social dinner. The time elapsed between the family reunion and the onset of each guest's symptoms was described. The cases that have been tested and their results are presented. Experience report: Nineteen people from a family group were followed for twelve days. The average incubation period was 37.16 hours. The incubation period was 24 hours in 11.11% of the cases, 36 hours in 66.67% and 48 hours in 22.22% of the individuals in the cluster. In just over five percent of patients, the estimated incubation period was 96 hours. The most frequent initial symptom was cough (38.8%). Final considerations: An ultrashort incubation period for SARS-CoV-2 can be an important alert for a new COVID-19 standard. However, our study is limited by the scarce number of individuals and the lack of tests before the meeting.