[lemma=infectious] [□]
[lemma=infectious] [□=□]
[lemma=infectious] [!□]
He attended a hospital emergency department during his infectious period at the same time as an unvaccinated 11-year-old who was presenting with a broken arm . The primary case in this outbreak developed a rash 16 days after returning from India and was only in Melbourne for 4 days during the infectious period . Demographic data , clinical details , vaccination history , exposures during the incubation period and contacts during the infectious period are recorded using structured telephone interviews . An unvaccinated 21-year-old female who may have traveled on the same train line as the primary case , visited a nightclub during her infectious period ( prior to rash onset ) .