The present invention relates to recombinantly constructed polypeptides useful for preparing vaccines, in particular for reducing one or more clinical signs caused by an infection with at least one pathogen, such as clinical signs caused by a viral infection. More particular, the present invention is directed to a polypeptide comprising a Circoviridae capsid protein linked to a heterologous protein or fragment thereof, and to chimeric virus-like particles composed of such polypeptides. In one example, a fusion protein is provided which comprises PCV2 ORF2 protein linked to an immunogenic fragment of rotavirus VP8 protein, and which is usable for reducing one or more clinical signs, mortality or fecal shedding caused by a rotavirus infection in swine.

The present invention relates to compositions or vaccines for combating Mycoplasma hyopneumoniae (M hyo), Porcine Circovirus type 2 (PCV2), and Porcine Reproductive and Respiratory Syndrome Virus (PRRSV) infections in animals and for increasing the ability of pigs to gain weight and/or improve death loss, methods of vaccination against the infections, and kits for use with such methods and compositions.

The present invention relates to compositions or vaccines for combating Mycoplasma hyopneumoniae (M hyo), Porcine Circovirus type 2 (PCV2), and Porcine Reproductive and Respiratory Syndrome Virus (PRRSV) infections in animals and for increasing the ability of pigs to gain weight and/or improve death loss, methods of vaccination against the infections, and kits for use with such methods and compositions.