J&J vaccine setback won't receive big market reaction, says Morgan Stanley's Mike Wilson

"I don't think there's going to be a huge reaction in the market beyond the knee-jerk reaction we're getting here right now," said Mike Wilson, chief U.S. equity strategist for Morgan Stanley, on CNBC's "Squawk Box." "We're optimistic, very optimistic that we're going to be reopened fully in the second half of this year."