The answer to your question is D. <span>. to protect students who cannot be vaccinated with herd immunity</span>
Do you need help with this? Cause there’s not much information.
Answer:
The ECG paper speed is ordinarily 25 mm/sec. As a result, each 1 mm (small) horizontal box corresponds to 0.04 second (40 ms), with heavier lines forming larger boxes that include five small boxes and hence represent 0.20 sec (200 ms) intervals.
Explanation:
