Virus culture improved

Viruses only grow within living cells, not easily done in a lab because any living cell would also attract bacteria. To deal with this Enders developed the technique of using penicillin to prevent bacterial growth in chicken embryos making it possible to study the poliomyelitis virus in the lab.
 John Franklin Enders United States 1948 Virus culture improved

Viruses only grow within living cells, not easily done in a lab because any living cell would also attract bacteria. To deal with this Enders developed the technique of using penicillin to prevent bacterial growth in chicken embryos making it possible to study the poliomyelitis virus in the lab.