इस ए बॉल बी बॉल इज इक्वल टू सी बॉल एंड द एंगल बिटवीन ए बॉल एंड बी बॉल इज 120 डिग्रीस इन द मैग्नेटिक ऑफ सी बॉल
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Vaccines prevent the spread of contagious, dangerous, and deadly diseases. These include measles, polio, mumps, chicken pox, whooping cough, diphtheria, and HPV. The first vaccine discovered was the smallpox vaccine. Smallpox was a deadly illness.
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