Answer:
it was only 90 percent effective
Explanation:
In 1954 a massive controlled field trial was launched, sponsored by the National Foundation for Infantile Paralysis. Almost two million U.S. children between the ages of six and nine participated. In some areas of the country half of these “Polio Pioneers” received the vaccine, while half received a placebo. In other areas of the country children who did not receive any vaccine were carefully observed. On April 12, 1955, Thomas Francis, Salk’s mentor and the director of the trial, reported that the vaccine was safe, potent, and 90% effective in protecting against paralytic poliomyelitis.
Answer:
True
Explanation:
Prokaryotic cell or bacterial cell contain cell wall which is made up of peptidoglycan and traditional antibacterial antibiotics were able to interfere with the cell wall synthesis and cause the destruction of bacterial cells.
For example, one of the most traditional antibiotic is penicillin which inhibit the synthesis of bacterial cell wall by blocking transpeptidation reaction. As it inhibits new cell wall formation it results in the formation of holes in the cell wall.
These holes in the cell allow movement molecules inside the cell and cause osmotic cell lysis. Therefore the statement is true.
The cold made me feel drained and tired. My nose was stuffy and my head hurt.
