. "Any process that stops, prevents, or reduces the frequency, rate, or extent of interferon-beta production." . . . "negative regulation of interferon-beta production" . "down regulation of interferon-beta production" . "down-regulation of interferon-beta production" . "downregulation of interferon-beta production" . "inhibition of interferon-beta production" . "negative regulation of IFN-beta production" . . .