“…The effect of ammonium ions on influenza virus infection was described independently by Jensen et al (1961) and Eaton & Scala (1961), and was later extended to a large number of aliphatic amines (Jensen & Liu, 1963;Fletcher et al, 1965). The inhibitory effect of chloroquine has been reported with myxoviruses (Inglot, 1969;Schimizu et al, 1972;Matlin et al, 1981), rhabdoviruses (Schimizu et al, 1972;, retroviruses (Pazmino et al, 1974), togaviruses (Inglot, 1969, Helenius et al, 1980aTalbot & Vance, 1980), paramyxoviruses (Inglot, 1969;Schimizu et al, 1972;Durand et al, 1970), herpes viruses (Lancz et al, 1971;Banfield & Kirsch, 1973) and mouse hepatitis virus (Malucci, 1966).…”