النتائج
إجابة صحيحة
$0
إجابتك
The near-eradication of polio has been possible because Jonas Salk made the patent public, making it accessible to all - not just those who can afford it.
إجابة صحيحة
$0
إجابتك
The near-eradication of polio has been possible because Jonas Salk made the patent public, making it accessible to all - not just those who can afford it.