It enters the heart via the pulmonary veins
Answer:
More than 11 300 readers voted for the introduction of clean water and sewage disposal—“the sanitary revolution”— as the most important medical milestone since 1840.
Explanation:
Medical milestones | The BMJhttps://www.bmj.com › content › medical-milestones
Answer:
Some vaccines contain whole bacteria or viruses. In these cases the bacteria or viruses will either be severely weakened (attenuated) so that they cannot cause disease in healthy people, or killed altogether (inactivated). Many vaccines contain only parts of viruses or bacteria, usually proteins or sugars from the surface. These stimulate the immune system but cannot cause disease
Explanation:
