 Emergent BioSolutions stock has spiked up over the past week as a monkeypox outbreak begins to spread to Europe and North America. The company is my Top Pick for monkeypox. Emergents smallpox vaccine, ACAM2000, is expected to be effective against monkeypox due to its close relation to the variola virus that causes smallpox. ACAM2000 is already in the national stockpile. 