B bilal k New member Dec 12, 2010 #1 I need two plausible explanations as to why whooping cough numbers have increased. I believe one is that the virus has built a stronger immunity towards vaccinations. Any ideas? Thank you
I need two plausible explanations as to why whooping cough numbers have increased. I believe one is that the virus has built a stronger immunity towards vaccinations. Any ideas? Thank you
