Tatyana
I have tried to address the question of BCG vaccination as a non-specific primer of immunity above on 1st April.
Not all patients on intubation and mechanical ventilation with induced coma require a tracheostomy. This is usually done in those who require prolonged ventilation, usually more than 2 weeks. Also there is another form of assisted ventilation called CPAAP which uses assisted mechanical ventilation but in conscious patients without intubation or induced coma.