006760000a22001810004500003000900000005001700009110008400026245012600110562002800236264004900264300000900313041000800322650005200330650001800382650001900400650001300419700006200432PH-MaWHO20241108112306.0 aWHO Advisory Committee on Variola Virus Research Meeting (2nd : 1999 : Geneva). aWHO Advisory Committee on Variola Virus Research : report of the second meeting, Geneva, Switzerland, 15-16 February 2001 aWHO/CDS/CSR/EDC/2001.17 aGeneva : bWorld_Health_Organization,c2001. a15p. aeng aVariola virusxGrowth and developmentxGenetics aOrthopoxvirus aViral vaccines aResearch aWorld Health Organization. Epidemic Disease Control Team.