By in vitro and in vivo methods it has been shown that the
simultaneous injection of 3 strains of neurotropic horsesickness virus results in the production of a solid immunity against each.
Description:
The articles have been scanned in colour with a HP Scanjet 5590; 300dpi.
Adobe Acrobat XI Pro was used to OCR the text and also for the merging and conversion to the final presentation PDF-format.
