It seems Shonen Jump will be delayed. This is due to a member of the editor staff coming up positive for the virus. Now I should point out this only to effect the latest issue according to Shuesha. If that changes I will let you know.
“As of April 8, 2020, [an employee] in their 40s working for the editorial department of Weekly Shonen Jump is suspected of being infected with the coronavirus. The employee refrained from coming into the office on April 2 when he had a fever, consulted a medical facility, waited at home, and then waited for a PCR test.
Shueisha has tried to prevent the spread of the virus by working from home starting April 6, but considering the risk of [viral] transmission to the writers and editorial staff, we have decided to delay the release of Weekly Shonen Jump #21 (digital and print) which was scheduled to release on April 20. The issue will be merged as Weekly Shonen Jump 21/22 and be released on April 27 instead. However, issue 20 will be released on April 13 as planned.
We sincerely apologize to our readers who’ve been anxiously awaiting news this week. In a time where the infection’s spread is uncertain, we’re prioritizing the health and safety of employees working with the writers who are delivering manga which brightens our readers. Thank you for understanding as we prepare to make changes to help us get through this [period].”

Article:https://comicbook.com/anime/2020/04/08/weekly-shonen-jump-issue-delay-coronavirus-pandemic-manga/
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