The investigational varicella vaccine (hereafter referred to as VNS vaccine) is a new
candidate varicella vaccine derived from the Oka strain. The main rationale for the
development of VNS vaccine is to provide an additional alternative varicella vaccine as an advantage from a public health perspective to prevent varicella disease

INVESTED is a multi-site trial comparing high-dose (60 μg per vaccine viral strain) trivalent influenza vaccine to standard-dose (15 μg per viral strain) quadrivalent influenza vaccination for up to three influenza seasons in high-risk cardiovascular disease patients with a history of myocardial infarction in the previous 12 months OR history of heart failure hospitalization in the previous 24 months. Subjects will be randomly assigned to receive either the high-dose or standard-dose vaccine.