FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13s - 16 or 15d - 16 of the Securities Exchange Act of 1934 For the month of December, 2006 Acambis plc (Translation of registrant's name into English) Peterhouse Technology Park 100 Fulbourn Road Cambridge CB1 9PT England (address of principal executive offices) (Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F Forms 20-F X Form 40-F Indicate by check mark whether the registrant by furnishing the information contained in this Form also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934). Yes No X (if "Yes" is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82- ). Enclosure: 1. Holding(s) in Company announcement made on 1 December 2006 2. Total Voting Rights announcement made on 13 December 2006 3. Holding(s) in Company announcement made on 18 December 2006 Enclosure No. 1 Holding in Company Cambridge, UK and Cambridge, Massachusetts - 1 December 2006 - Acambis plc ("Acambis") (LSE: ACM, NASDAQ: ACAM) announces an interest in its shares by The Goldman Sachs Group, Inc. On 30 November 2006, Acambis received notification that, as of the close of business on 28 November 2006, The Goldman Sachs Group, Inc., ("GS Inc") of 85 Broad Street, New York, NY 10004, USA, was interested in a total of 14,119,712 ordinary shares of 10p each, representing a 13.15% holding of Acambis' issued share capital. Of these 14,119,712 shares: a) the interest in 477,615 shares arose from an interest held by Goldman, Sachs & Co. ("GS&Co."), a direct subsidiary of GS Inc., acting as custodian; these shares are, or will be, registered in the name of Goldman Sachs Securities (Nominees), Limited ("GSSN"); b) the interest in 3,300 shares arose from an interest held by GS&Co, a direct subsidiary of GS Inc, acting as a discretionary manager. These shares are, or will be, registered in the name of GSSN; c) the interest in 351,500 shares arose from an interest held by GS&Co, acting as custodian of 175,750 American Depositary Receipts ("ADRs"); these ADRs are, or will be, held at The Depositary Trust Company, New York; d) the interest in 13,287,297 shares arose from a beneficial interest held by Goldman Sachs International, a direct subsidiary of GS Inc; these shares are, or will be, registered at CREST in account CREPTEMP. -ends- Enquiries: Acambis plc Elizabeth Brown, Company Secretary: Tel: +44 (0) 1223 275 300 Lyndsay Wright, VP, Communications and Investor Relations: Tel: +44 (0) 1223 275 300 About Acambis Acambis is a leading biotechnology company targeting infectious diseases with novel vaccines. Acambis' development-stage pipeline includes vaccines that could either offer improvements over existing products or target unmet medical needs. Its investigational vaccine against Japanese encephalitis, ChimeriVax-JE, which is undergoing Phase 3 clinical testing, is intended to provide an "ideal" vaccine to address the estimated 50,000 cases of this viral disease in Asia every year. Acambis' proprietary ChimeriVax technology, developed in association with St Louis University, has also been used to develop ChimeriVax-West Nile, which is undergoing Phase 2 clinical testing, making it the most advanced investigational vaccine against the West Nile virus. Acambis also has the only vaccine in development against Clostridium difficile bacteria, a leading cause of hospital-acquired infections. Recognised internationally as the leading producer of smallpox vaccines, Acambis is developing an investigational smallpox vaccine, ACAM2000, and is manufacturing emergency-use stockpiles of this investigational vaccine for the US Government and other governments around the world. It is also developing an attenuated smallpox vaccine, MVA3000, under contracts with the US National Institutes of Health. Acambis is based in Cambridge, UK and Cambridge, Massachusetts, US, and is listed on the London Stock Exchange (ACM). Its shares are listed on NASDAQ (ACAM) in the form of American Depositary Receipts. More information is available at www.acambis.com. "Safe Harbor" statement under the Private Securities Litigation Reform Act of 1995: The statements in this news release that are not historical facts are forward-looking statements that involve risks and uncertainties, including the timing and results of clinical trials, product development, manufacturing and commercialisation risks, the risks of satisfying the regulatory approval process in a timely manner, the need for and the availability of additional capital. For a discussion of these and other risks and uncertainties see "Risk management" in the Company's 2005 Annual Report and "Risk factors" in its Form 20-F, in addition to those detailed on the Company's website and in the Company's filings made with the Securities and Exchange Commission from time to time. These forward-looking statements are based on estimates and assumptions made by the management of Acambis and are believed to be reasonable, though are inherently uncertain and difficult to predict. Actual results or experience could differ materially from the forward-looking statements. Enclosure No. 2 Voting rights and capital Cambridge, UK and Cambridge, Massachusetts - 13 December 2006 - Acambis plc ("Acambis") (LSE: ACM; NASDAQ: ACAM), in conformity with the Financial Services Authority's ("FSA") Transparency Directive transitional provision 6, notifies that Acambis' share capital consists of 107,374,227 ordinary 10p shares, each share having equal voting rights. This figure may be used by shareholders as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in, Acambis under the FSA's Disclosure and Transparency Rules. -ends- Enquiries: Acambis plc Lyndsay Wright, VP, Communications and IR Elizabeth Brown, Company Secretary Tel: +44 (0 1223 275 300 About Acambis Acambis is a leading biotechnology company targeting infectious diseases with novel vaccines. Acambis' development-stage pipeline includes vaccines that could either offer improvements over existing products or target unmet medical needs. As well as ChimeriVax-JE, Acambis' proprietary ChimeriVax technology, developed in association with St Louis University, has also been used to develop ChimeriVax-West Nile, which is undergoing Phase 2 clinical testing, making it the most advanced investigational vaccine against the West Nile virus. Acambis also has the only vaccine in development against Clostridium difficile bacteria, a leading cause of hospital-acquired infections. Recognised internationally as the leading producer of smallpox vaccines, Acambis is developing an investigational smallpox vaccine, ACAM2000, and is manufacturing emergency-use stockpiles of this investigational vaccine for the US Government and other governments around the world. Acambis is based in Cambridge, UK and Cambridge, Massachusetts, US, and is listed on the London Stock Exchange (ACM). Its shares are listed on NASDAQ (ACAM) in the form of American Depositary Receipts. More information is available at www.acambis.com. "Safe Harbor" statement under the Private Securities Litigation Reform Act of 1995: The statements in this news release that are not historical facts are forward-looking statements that involve risks and uncertainties, including the timing and results of clinical trials, product development, manufacturing and commercialisation risks, the risks of satisfying the regulatory approval process in a timely manner, the need for and the availability of additional capital. For a discussion of these and other risks and uncertainties see "Risk management" in the Company's 2005 Annual Report and "Risk factors" in its Form 20-F, in addition to those detailed on the Company's website and in the Company's filings made with the Securities and Exchange Commission from time to time. These forward-looking statements are based on estimates and assumptions made by the management of Acambis and are believed to be reasonable, though are inherently uncertain and difficult to predict. Actual results or experience could differ materially from the forward-looking statements. Enclosure No. 3 Holding in Company Cambridge, UK and Cambridge, Massachusetts - 18 December 2006 - Acambis plc ("Acambis") (LSE: ACM) announces an interest in its shares by The Goldman Sachs Group, Inc. On 15 December 2006, Acambis received notification that, as of the close of business on 12 December 2006, The Goldman Sachs Group, Inc., ("GS Inc") of 85 Broad Street, New York, NY 10004, USA, was interested in a total of 15,270,515 ordinary shares of 10p each, representing a 14.22% holding of Acambis' issued share capital. Of these 15,270,515 shares: a) the interest in 485,115 shares arose from an interest held by Goldman, Sachs & Co. ("GS&Co."), a direct subsidiary of GS Inc., acting as custodian; these shares are, or will be, registered in the name of Goldman Sachs Securities (Nominees), Limited ("GSSN"); b) the interest in 200 shares arose from an interest held by GS &Co, of 100 American Depositary Receipts ("ADRs"); c) the interest in 347,900 shares arose from an interest held by GS&Co, acting as custodian of 173,950 ADRs; these ADRs are, or will be, held at The Depositary Trust Company, New York; d) the interest in 14,437,300 shares arose from a beneficial interest held by Goldman Sachs International, a direct subsidiary of GS Inc; these shares are, or will be, registered at CREST in account CREPTEMP. -ends- Enquiries: Acambis plc Elizabeth Brown, Company Secretary: Tel: +44 (0) 1223 275 300 Lyndsay Wright, VP, Communications and Investor Relations: Tel: +44 (0) 1223 275 300 About Acambis Acambis is a leading biotechnology company targeting infectious diseases with novel vaccines. Acambis' development-stage pipeline includes vaccines that could either offer improvements over existing products or target unmet medical needs. As well as ChimeriVax-JE, Acambis' proprietary ChimeriVax technology, developed in association with St Louis University, has also been used to develop ChimeriVax-West Nile, which is undergoing Phase 2 clinical testing, making it the most advanced investigational vaccine against the West Nile virus. Acambis also has the only vaccine in development against Clostridium difficile bacteria, a leading cause of hospital-acquired infections. Recognised internationally as the leading producer of smallpox vaccines, Acambis is developing an investigational smallpox vaccine, ACAM2000, and is manufacturing emergency-use stockpiles of this investigational vaccine for the US Government and other governments around the world. Acambis is based in Cambridge, UK and Cambridge, Massachusetts, US, and is listed on the London Stock Exchange (ACM). More information is available at www.acambis.com. "Safe Harbor" statement under the Private Securities Litigation Reform Act of 1995: The statements in this news release that are not historical facts are forward-looking statements that involve risks and uncertainties, including the timing and results of clinical trials, product development, manufacturing and commercialisation risks, the risks of satisfying the regulatory approval process in a timely manner, the need for and the availability of additional capital. For a discussion of these and other risks and uncertainties see "Risk management" in the Company's 2005 Annual Report and "Risk factors" in its Form 20-F, in addition to those detailed on the Company's website and in the Company's filings made with the Securities and Exchange Commission from time to time. These forward-looking statements are based on estimates and assumptions made by the management of Acambis and are believed to be reasonable, though are inherently uncertain and difficult to predict. Actual results or experience could differ materially from the forward-looking statements. SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant Peptide Therapeutics Group has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. Date: 29 December, 2006 ACAMBIS PLC By: /s/ Lyndsay Wright Name: Lyndsay Wright Title: VP, Communications and IR.