New York polio case is the 'tip of the iceberg,' hundreds of others could be infected, health official says
By Spencer Kimball
Polioviruses found in wastewater samples in 2 N.Y. counties, suggesting continued spread
By Helen Branswell
Lessons from how the polio vaccine went from the lab to the public that Americans can learn from today
By Carl Kurlander & Randy P. Juhl
'Hundreds' of New Yorkers may already be infected with polio, Empire state health chief warns
By Mansur Shaheen