RSV

In severe cases

Respiratory syncytial virus can lead to a lower respiratory tract illness such as pneumonia or bronchiolitis — an inflammation of the small airway passages entering the lungs. Signs and symptoms may include:

Fever
Severe cough
Wheezing — a high-pitched noise that's usually heard on breathing out (exhaling)
Rapid breathing or difficulty breathing, which may make the child prefer to sit up rather than lie down

So now we know. I was puzzled why Vera kept trying to sit up in bed before she worsened and had to be intubated.

RSV is highly contagious. Which probably explains why I'm sick now, having been suctioning Vera during the onset of the virus.

In adults, RSV can be just sore throat, cold, copious amounts of mucus , and symptoms usually show up 4-6 days after exposure.