Filed Pursuant to Rule 424(b)(3)
Registration No. 333-280535
PROSPECTUS
490,509 Shares of Common Stock
This prospectus relates to the resale, from time to time, by the selling stockholders identified in this prospectus under the caption
Selling Stockholders, or the Selling Stockholders, of up to 490,509 shares of our common stock, par value $0.0001 per share, or the Shares, comprising (i) 18,113 shares of our common stock, or the Common Shares, (ii) 247,170 shares of
our common stock, or the Warrant Shares, issuable to the Selling Stockholders upon the exercise of warrants, or the Warrants, and (iii) 225,226 shares of our common stock, or the Conversion Shares, issuable to one of the Selling Stockholders upon
conversion of shares of our Series A Preferred Stock, or the Preferred Shares. The Common Shares, Warrants and Preferred Shares were issued to the Selling Stockholders in March 2024.
We are not selling any shares of common stock under this prospectus and will not receive any proceeds from the sale of shares of common stock
by the Selling Stockholders hereunder. We will, however, receive the net proceeds of any Warrants exercised for cash. The Selling Stockholders will bear all commissions and discounts, if any, attributable to the sale of the Shares. We will bear all
costs, expenses, and fees in connection with the registration of the Shares.
The Selling Stockholders may sell the shares of our common
stock offered by this prospectus from time to time on terms to be determined at the time of sale through ordinary brokerage transactions or through any other means described in this prospectus under the caption Plan of Distribution. The
shares of common stock may be sold at fixed prices, at market prices prevailing at the time of sale, at prices related to prevailing market price or at negotiated prices.
Our common stock is listed on the Nasdaq Capital Market under the symbol VCNX. On July 5, 2024, the closing price of our
common stock was $6.64 per share.
Investing in our common stock involves a high degree of risk. See Risk Factors beginning on
page 5 of this prospectus and under similar headings in the documents incorporated by reference into this prospectus.
Neither
the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.
The date of this prospectus is July 8, 2024.