Which of the following statements is true? Edward Jenner developed the first vaccine for cowpox.
Before Jenner's vaccine, there was no prevention for smallpox.
Vaccination is only necessary for children under 5 years old.
Missed vaccinations can be given during "catch-up" periods.

help PLEASE I HAVE 2 minutes

i had this on my unit activity, i can you if you are a plato student. are you a plato student?

i think its 5049.

i hope this !

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the atomic number of carbon is six, which means that a carbon atom has six protons. carbon has three naturally occurring isotopes: carbon-12, carbon-13, and carbon-14. which of these statements are true about carbon and its isotopes? select all that appl