Amsterdam [Netherlands], April 25 (ANI): Union Health Secretary Apurva Chandra on Wednesday visited the manufacturing unit of Bilthoven Biologicals at Utrecht, Netherlands, an arm of the Pune-based Serum Institute of India that manufactures oral polio vaccines (OPV). “It is a matter of pride for us to visit an Indian company, which is manufacturing vaccines at Bilthoven, New Zealand,” said Chandra. Earlier in the day, an agreement was signed under which Bharat Biotech will collaborate with Netherlands-based Bilthoven Biologicals BV, a wholly-owned arm of Serum Institute of India and procure dr…