What is the appropriate response if a child shows signs of severe respiratory distress?

When a child is exhibiting signs of severe respiratory distress, the priority is to ensure their airway is open and they are receiving adequate oxygen. Providing oxygen helps alleviate hypoxemia and can stabilize the child's condition while facilitating better breathing. Immediate transport to a medical facility is crucial for further evaluation and intervention, as severe respiratory distress can lead to critical complications if not managed quickly.

Monitoring and waiting for improvement is not advisable in severe cases, as it can delay necessary treatment and exacerbate the child's condition. While antihistamines may be helpful in specific allergic reactions, they do not address the immediate need for oxygenation. Assessing for a possible fever can be part of a broader assessment but does not directly address the acute respiratory distress requiring urgent action. Thus, providing oxygen and transporting the child immediately is the most appropriate response in this scenario.