Goofs

As Janeway tries to enter sickbay, the doctor puts a phaser and part of his hand through the door to stop her. Previously, the doctor putting his hand out of the door has caused it to disappear. The Doctor now has his Mobile Emitter which lets him leave sick bay. However, as he starts to treat Janeway, it can be seen that he is not wearing the mobile emitter. He only dons the emitter later when he and Janeway leave through the maintenance hatch.

Just before the Dr beams back up to voyager from the planet he's on, you can clearly see as he's talking to chakotay on the hand link, some dirt smears on the top of his jumper (Which look like he rubbed up against something) but then once back on the ship, as he walks off the transporter, he's jumper is completely clean.

The buzzing sound a fly, bee or mosquito make are the sounds of its wings flapping. The creatures in this story, have no wings.

First appearance of the new designed phaser rifles. Problem is, how did they get them since they are lost in the Delta Quadrant? They didn't get the new designed uniforms because of their predicament. They kept the Star Trek: Deep Space Nine (1993) uniforms throughout the entire series.

The Doctor says that a few of the marcoviruses managed to migrate from the biofilter into the pattern buffer before he could purge the filters. Problem is when any physical object or organism is stored in the transporter's pattern buffer it has no physical form, it exists as pure energy. The virus would have no way of moving anywhere without first being rematerialized by the transporter.

The macrovirus "particles" float, hover, and fly. They move as if they are microscopic in a human circulatory system, but outside a body, on a ship with artificial gravity, they should have no ability to move, let alone fly.

Once the macrovirus organisms take form outside of a host body and start flying around the ship, the crew should not have had any problems locking onto them with the ship's internal scanners and either remotely confining them within force fields or beaming them directly into a container or even off the ship.

When entering the Jeffery's tube with Janeway the Doctor asks her to remind him how to get to environmental control on deck 12. He says that he has been studying the ship's blueprints but hasn't fully memorized them. However as a computer program (albeit a sentient one) the Doctor does not forget things, any information stored in his database can be instantly accessed and recalled, he wouldn't need to study or worry about forgetting anything.

The Doctor and Janeway leave sickbay via Jefferies tube. Neither of them closes the hatch, or doesn't appear to before reaching the tubes junction point.