Measles virus (of large size) and SV40 virus (of small size), TEM. This electron micrograph reveals both a paramyxovirus measles virus, and virions of the polyomavirus, simian virus SV40 (smaller circles)

horizontal result comparison scientific imagery microscope electronic microscope tem medicine measles proteic envelope microbiology microorganism virology virus capsid nucleocapsid dna virus papovavirus polyomaviridae polyomavirus sv40 virus rna virus paramyxoviridae morbillivirus measles virus