live attenuated vaccine
Sale Price:$400.00
Original Price:$500.00
sale
This was the first live attenuated vaccine, and the smallpox virus was eradicated because the vaccine was highly effective and easily preserved, even with the resources available at the time. google live score Similarly, the number of poliovirus cases has decreased by over 99% since the late 1980 s [72] , thanks to the use of vaccines
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