Which adverse effect is of greatest concern for the patient undergoing treatment for multiple sclerosis?

The 4-year-old patient with a history of sickle cell disease is brought to the emergency room complaining of severe chest pain and cough. Upon assessment, the nurse notes a respiratory rate of 32, a temperature of 39.1°C, and a heart rate of 128 bpm. Which test results does the nurse anticipate? Select all that apply.

The nurse is reviewing the lab results of a patient in the intensive care unit and finds the patient’s lactate to be 5.4 mmol/L. Which additional value is most responsible for this value?