Dr Machin has interests in clinical microbiology and clinical virology. In particular, he has expertise in the diagnosis and management of viral infections in sexual health, solid organ and haematological transplant and critically ill patients. Additionally, in the diagnosis and management of emerging viral infections, having been involved in the recent COVID-19 pandemic and Monkeypox outbreak. He has a specialist interest in infection prevention and control of viral infections in hospital settings.

Medical microbiology and virology • Infectious diseases • Infection prevention and control • Vaccination • Antibiotics • Laboratory testing for the diagnosis of infection

Haemato-oncological malignancies and non-malignant disorders • All aspects of stem cell transplantation and post-transplant complications, including veno-occlusive disease, micro-angiopathy, capillary leak syndrome, idiopathic pneumonitis, neutropenic sepsis, neutropenic colitis • Unusual infections of the immunocompromised host, including aspergillus, candida, CMV, EBV, Adenovirus or COVID reactivations/infections, engraftment failure, graft-versus-host-disease, etc.

Infection & infectious diseases • Hospital-acquired infection • Travel & tropical medicine • All vaccinations • Especially: AIDS/HIV, Campylobacter, Clostridium difficile , COVID-19, encephalitis, Escherichia coli O157, food poisoning, gastroenteritis, immunisations, Legionnaire's disease, leishmaniasis, leptospirosis, life expectancy, listeriosis, Lyme disease, malaria, meningitis, monkeypox, MRSA, norovirus, Q fever, sepsis, septic shock, swine flu, toxoplasmosis, typhoid fever, tuberculosis