Part 10/16:
The investigations revealed that individuals could transmit the virus before showing any symptoms—challenging previous assumptions based on diseases like SARS, where infectivity mostly occurred after fever onset. This realization prompted updates to contact tracing protocols, emphasizing the importance of identifying exposure links up to two days before symptom onset.
The cases within the Grace church cluster underscored how pre-symptomatic transmission could fuel outbreaks. Despite rigorous contact tracing and quarantining, multiple cases continued to emerge, highlighting the difficulty in containing the virus in settings with large gatherings.